International

I International

by  Anna-Lena Weise

New York now or never!

It is well known that the ZERO circle of friends was active internationally and was geared toward international networking from the very beginning. Heinz Mack (b. 1931), Otto Piene (1928–2014), and Günther Uecker (b. 1930) cultivated intensive contacts with the Dutch group Nul, the Italian artists associated with the magazine Azimuth, the Nouveaux Réalistes from Paris, and many other artists including Almir Mavignier (1925–2018), Jésus Rafael Soto (1923–2005), Bernard Aubertin (1934–2015), Christian Megert (b. 1936), Paul de Vree (1909–1982), and Jef Verheyen (1932–1984).


After group exhibitions had taken place all over Europe in the early nineteen-sixties, the “conquest” of America was launched in 1964. ZERO is regarded as an early artists’ association, with members from Europe and Germany that attracted a great deal of public attention in the USA in the early nineteen-sixties. The exhibition Group Zero, at the Institute of Contemporary Art, University of Pennsylvania, Philadelphia, fired the starting gun.[i]


[i] See Tina Rivers Ryan, “‘Before It Blows Up’: ZERO‘s American Debut, and Its Legacy,” in Tiziana Caianiello and Mattijs Visser, eds.,The Artist as Curator: Collaborative Initiatives in the International ZERO Movement 1957–1967 (Ghent, 2015), p. 363; Anette Kuhn, ZERO: Eine Avantgarde der sechziger Jahre (Frankfurt am Main and Berlin, 1991), pp. 51–52.
America and European Art

In the first half of the twentieth century, the US art market was dominated by the demand for European artworks. The nineteen-twenties and nineteen-thirties in particular were defined by Old Masters and European Impressionists. Contemporary European artists, many of whom had been forced to flee their home countries as refugees following the Nazi takeover of power in 1933, also contributed to the importation of European art into the USA. The Société Anonyme, founded by Marcel Duchamp (1887–1968) together with Man Ray (1890–1976) and Katherine Dreier (1877–1925) in 1920, the Museum of Modern Art (MoMA), founded in 1929, and the Museum of Non-Objective Painting (later the Solomon R. Guggenheim Museum), founded in 1939, each initially focused almost entirely on European art. In 1930, MoMA mounted the exhibition Painting in Paris, from American Collections, which evidenced American collectors’ preference for the masters of French modernism.[i]

[i] See Norman Rosenthal, “Amerikanische Kunst: Eine Sicht aus Europa,” in Christos M. Joachimides and Norman Rosenthal, eds.,Amerikanische Kunst im 20. Jahrhundert: Malerei und Plastik 1913–1993, exh. cat. Martin-Gropius-Bau and Royal Academy of Arts (London and Berlin, 1993), p. 13; Gail Stavitsky, “Museen und Sammler,” in Joachimides and Rosenthal 1993, p. 166; Thomas Kellein, “Es ist die schiere Grösse: Die Rezeption der amerikanischen Kunst in Europa,” in Joachimides and Rosenthal 1993, p. 211; Britta E. Buhlmann, “Art Is Not an Object but an Experience,” in Abstrakter Expressionismus in Amerika, exh. cat. Pfalzgalerie and Ulmer Museum (Kaiserslautern, 2001), p. 19. Symbolism, Cubism, and Fauvism were the most talked-about art movements at that time. Many American artists went to Paris, the art capital of Europe, to learn from the main proponents of these movements, while Marcel Duchamp emigrated to New York during the First World War, working there to establish an infrastructure of private collectors, gallery owners, artists, and museums.

Indeed, according to Anette Kuhn, despite the wave of artist emigrants, German art was of scant importance in America, and “was at a disadvantage for decades due to the intellectual and artistic dominance of the École de Paris.”[i]

[i] Kuhn 1991 (see note 1), pp. 52–53.

After the war in Europe, American art entered a phase of renewal. It was at this time that Jackson Pollock (1912–1956) began to create what are now considered his masterpieces, which were classified as “Abstract Expressionism” by the art critic Clement Greenberg.[i] In 1948, the artist Barnett Newman (1905–1970) opined that artists should liberate themselves from the legend, the mystique, and all the other contrivances of Western European art.[ii]

Abstract Expressionism began to take over the field and supplant the predominant figurative painting. At the same time, rising prosperity in postwar America encouraged the emergence of an art market for contemporary domestic art, which a growing number of art dealers offered at relatively low prices. MoMA also actively promoted the visibility of American artists in their home country through its group exhibitions in 1946, 1948, 1951, and 1955. The European art trade was practically nonexistent after the war broke out, and a new center for young contemporary art emerged in New York—in the galleries of Peggy Guggenheim, Sidney Janis, Samuel Kootz, and Betty Parsons. The convergence of artists, critics, gallery owners, institutions in New York established the city both in the USA and overseas as the center of American art. As an art metropolis, New York gradually replaced Paris, which had been cut off culturally for five years due to its occupation by the Nazis from 1940.[iii] Thomas Kellein summarizes this upheaval as follows:

[i] See Rosenthal 1993 (see note 2), pp. 13–19.

[ii] See Barnett Newman, “The Sublime Is Now” (1948), in Barnett Newman: Selected Writings and Interviews, ed. John O’Neill (New York, 1990), p. 173. The Abstract Expressionists prioritized the creative act of painting over the content or theme of their works. However, it is debatable whether Newman successfully achieved this goal, considering the titles of his works.

[iii] See Lena Brüning, Die Galerie Schmela: Amerikanisch-deutscher Kunsttransfer und die Entwicklung des internationalen Kunstmarktes in den 1960er Jahren (Berlin, 2022), p. 41; Bettina Friedl, “Die amerikanische Malerei zwischen 1670 und 1980,” in Visuelle Kulturen der USA: Zur Geschichte von Malerei, Fotografie, Film, Fernsehen und Neuen Medien in Amerika (Bielefeld, 2010), p. 73; Stavitsky 1993 (see note 2), p. 167; Kellein 1993 (see note 2), p. 212; Buhlmann 2001 (see note 2), pp. 19, 21; Serge Guilbaut, How New York Stole the Idea of Modern Art: Abstract Expressionism, Freedom, and the Cold War, trans. Arthur Goldhammer (Chicago, 1983), pp. 1, 49.

“Art was increasingly discovered, exhibited, and traded in New York for the nuclear-secured and culturally blank and abstract NATO area. After only a decade, from around 1960, the centuries-long supremacy of European painting and sculpture was finally called into question.”[i]

[i] Kellein 1993 (see note 2), p. 212.

American Art in Germany

In the postwar period, Germany faced cultural challenges due to the occupation, resulting in a return to prewar art. On the relationship between the occupying powers and art in Germany, Jill Michelle Holaday writes: “Initially, the Allies championed the ‘degenerate’ art burned by the Nazis, but not contemporary art. Expressionism came to symbolize an art appropriate for a new democracy.”[i] However, many German artists and critics disagreed with this and considered prewar Expressionism outdated.

During the growing tensions between the USA and the USSR, cultural policy gained more attention and culture was instrumentalized as a political tool:[ii]

[i] Jill Michelle Holaday, Die Gruppe ZERO. Working through Wartime Trauma, Ph.D. diss. (University of Iowa, 2018), pp. 10–11.

[ii] See Carsten Kretschmann, Zwischen Spaltung und Gemeinsamkeit: Kultur im geteilten Deutschland (Berlin, 2012), pp. 15ff, 35; Brüning 2022 (see note 6), p. 35. The Allies also set the tone in the field of culture. They sought to create new structures, to regulate them and, above all, to control them rigorously.

“Certain movements were actively promoted, while others were gradually disappearing from the public eye. Abstract art was favored in terms of cultural policy as ‘modern,’ ‘European,’ or ‘Western,’ with its supposedly non-ideological and non-political visual language, whereas figurative, narrative visual language was ascribed to the ‘East’ or ‘communism’ and increasingly suppressed in West Germany.”[i]

[i] Brüning 2022 (see note 6), pp. 35–36, 56–57.

This return to abstract painting after 1945 thus also represented a dissociation from National Socialist realism. At least in the three zones occupied by the Western Allies, there was a direct break with this era.[i]

The introduction of American fine art into Germany in the postwar period was initially slow. It was barely noticeable at all in Düsseldorf. After the unification of the US and British occupied zones in 1947, American influence spread to the Rhine-Ruhr region. The Cultural Exchange Program, which was intended to enable individual artists and creatives in the USA and Germany to visit each other’s countries, had been launched in 1946, but the absence of a market for art in Germany nevertheless spread a feeling of isolation around the art academies. Heinz Mack commented on this in a conversation with Betty van Garel:

[i] See Kretschmann 2012 (see note 9); Brüning 2022 (see note 7), p. 35.

“We in Germany—our friends in Holland must have been in the same situation—were badly informed about what was actually going on in the world. It wasn’t until 1948, 1949, that what was happening in America became known, where a man like Pollock had created his great paintings. We then had the uncomfortable feeling that something had happened there that we had missed. That there was no point any more in us creating things that had already been done over there.”[i]

[i] Quoted in Dieter Honisch, Mack: Skulpturen 1953–1986 (Düsseldorf and Vienna, 1986), p. 10.

The reception of American art in Europe took place primarily via MoMA, which had its own pavilion at La Biennale di Venezia in 1948, and became an important cooperative partner for various departments of the US government. Starting in 1952, an international touring exhibition program was set up at MoMA under the direction of Porter A. McCray, consisting of the museum’s contemporary art collection. This made the institution one of the foremost exhibition organizers in Europe in the following years.[i] After MoMA’s first touring exhibition, Twelve Contemporary American Painters and Sculptors, was shown in Paris, Zurich, Düsseldorf, Stockholm, Helsinki, and Oslo, from April 1953, it still took almost five years for American art to become one of the biggest influences on the development of the German art market. The Documenta exhibition of contemporary art, which took place for the first time in Kassel in 1955, made an important contribution to this. At Documenta 2 in 1956, an entire room was dedicated to Jackson Pollock, who had recently died.[ii]

From 1953 to 1957, the Düsseldorf ZERO artists experimented with various styles and created works that certainly exhibited Expressionist tendencies. However, like the Minimalists in America, they turned their backs on this style. The means that they used to expand their art included novel materials such as silver foil, spotlights, plexiglass, and aluminum; plus, with their Demonstrations, their art entered the experiential realm.[iii] A similar phenomenon could be observed in New York at around the same time, as Allan Kaprow (1927–2006) noted:

[i] See Brüning 2022 (see note 6), pp. 38–42; Kellein 1993 (see note 2), pp. 211ff; Werner Abelshauser, Deutsche Wirtschaftsgeschichte seit 1945 (Munich, 2004), p. 114. In the nineteen-fifties, exhibitions put on by the American Federation of Artsand the Smithsonian Institution Traveling Exhibition Service sought to bring American art to a wider audience at home and abroad. However, as no contemporary American art was included, the focus was not on publicizing current trends.

[ii] See Brüning 2022 (see note 6), pp. 38–42; Kellein 1993 (see note 2), pp. 211ff; Abelshauser 2004 (see note 13), p. 114.

[iii] See Holaday 2018 (see note 8), p. 13; Valerie Hillings, Experimental Artists’ Groups in Europe, 1951–1968: Abstraction, Interaction, and Internationalism, Ph.D. diss. (New York University, 2002), p. 124.

“Not satisfied with the suggestion through paint of our senses, we shall utilize the specific substances of sight, sound, movement, people, odors, food, electric and neon light, smoke, water, old socks, a dog, movies, a thousand other things which we have always had about us, but ignored, but they will disclose entirely unheard of happenings.”[i]

[i] Allan Kaprow, “The Legacy of Jackson Pollock,” Art News 57, no. 6 (October 1958), pp. 24–25.

The ZERO artists did use similar techniques and forms as the New York Minimalists, but their works often had a transcendental meaning.

The ZERO Artists and America

The ZERO artists Uecker, Piene, and Mack, as well as others belonging to this circle, had already been in contact individually with several institutions in America, some years before the big ZERO show took place. Robert Pincus-Witten notes that

“Klein’s generation certainly reflected an early fascination with the United States, not least because of the glamour shed by a victor—America had, after all, won the war.”[i]

[i] Rotraut Klein-Moquay and Robert Pincus-Witten, Yves Klein: USA (Paris, 2009), p. 38.

That both Mack and Piene were interested in the American way of life is evidenced by an invitation from Louis Garinger to the Salzburg Seminar in American Studies in Austria in 1959.[i] Yves Klein (1928–1962), meanwhile, traveled to New York in 1961 for a two-month stay and to visit his first solo exhibition at the Castelli Gallery, which opened its doors on April 11, 1961. (Castelli had already presented Klein’s work in a 1959 exhibition, Works in Three Dimensions, along with works by John Chamberlain, Marisol, and Robert Rauschenberg.) At that time, it took approximately eight days to cross the Atlantic aboard a liner. In general, traveling was much more complicated, expensive and, above all, time-consuming than it is today.[ii]

[i] Louis Garinger to Heinz Mack and Otto Piene, Salzburg, December 22, 1959, archive of the ZERO foundation, estate of Heinz Mack, inv. no. mkp.ZERO.1.I.1335; estate of Otto Piene, inv. no. mkp.ZERO.2.I.506.

[ii] Leo Castelli had had a gallery in Manhattan since 1957, where he at first showed European and French art. However, he was quick to include American Abstract Expressionism in his program.

The exhibition received a rather negative response from the New York audience, with reviews being critical. Only three sponge sculptures were sold, and not a single monochrome. Additionally, the exhibition attracted far fewer visitors than in Europe. According to the critics, “Klein was still far from being recognized as the most influential artist to have emerged in postwar France.”[i]

In May 1961, the Dwan Gallery in Los Angeles presented the works of “Yves le Monochrome.” At the time, Klein was thinking about creating a giant Méta-matic/Anthropometry machine in collaboration with Jean Tinguely. His idea of dipping hired models in blue paint and having them leave their traces on a large white canvas was never realized.[ii]

During his first visit to the USA, Pontus Hultén, then director of the Moderna Museet in Stockholm, met the engineer Billy Klüver, and together they set the course for Jean Tinguely. Tinguely achieved fame in the USA with his Homage to New York of 1960. The idea for his self-destructing machine is said to have come to him in January 1960, when he was in New York for his first solo show, at the Staempfli Gallery. His Méta-maticdrawing machines were his entrée to the young New York art scene and caught the attention of Marcel Duchamp, Jasper Johns (b. 1930), Robert Rauschenberg (1925–2008), and others. Rauschenberg contributed his first kinetic object to the Homage, titled Money Thrower for Tinguely’s H.T.N.Y.—a toaster that released silver dollars, spewing them into the audience.[iii]

Alongside Tinguely, his close friend Daniel Spoerri (b. 1930) was also represented in the 1961 exhibition The Art of Assemblage at MoMA, the museum purchasing his work Kichkas Frühstück (Kichka’s Breakfast), in 1960.

[i] Klein-Moquay and Pincus-Witten 2009 (see note 17), p. 35.

[ii] See Klein-Moquay and Pincus-Witten 2009 (see note 17), pp. 44ff.

[iii] See “Autodestruktive Aktionen,” in Jean Tinguely: Super Meta Maxi, exh. cat. Museum Kunstpalast and Stedelijk Museum Amsterdam (Düsseldorf and Cologne, 2016), pp. 70ff; Roland Wetzel, preface and introduction to Robert Rauschenberg—Jean Tinguely: Collaborations, exh. cat. Museum Tinguely (Basel, 2009), p. 7; Kellein 1993 (see note 2), p. 217.

Hans Haacke (b. 1936) was one of the first in the ZERO circle to live in America for a longer period of time—from 1961 to 1963. He moved to the USA in 1961 on a Fulbright scholarship and enrolled as a scholarship holder at the Tyler School of Art at Temple University, Philadelphia, in 1962. On September 8, 1962, he wrote to Otto Piene from Philadelphia, informing him that he would be going to New York the following week. He then enrolled at the Pratt Graphic Art Center, where he remained until 1963. Despite taking a dim view of America as a consumer society—where “everything is offered for sale and consumed: goods, opinions, mass manipulation, religion, racial hatred, everything”—and predicting the arrival of the “American way of life” in Germany, he nevertheless appreciated his stay,[i] and, in a letter of March 21, 1963, he even considered extending his stay in New York for another year, describing it as an “outrageously fascinating city.”[ii]

Although Haacke rejected the GRAV (Groupe de Recherche d’Art Visuel), founded in Paris in 1960 to focus on perceptual phenomena in art, he acknowledged that “their exhibition in NY was good,”[iii] since Pop Art was otherwise predominant in every gallery.[iv] Thus Haacke missed the challenge of colleagues who worked in the same manner as ZERO. In view of the fact that Pop Art, with its bright colors and large dimensions, clearly set itself apart from ZERO’s art, Haacke’s temporary embrace of GRAV seems only logical. On September 1, 1963, he decided to return to Germany.[v] However, he did not stay in Cologne very long, and returned to the United States permanently in 1965.

[i] Hans Haacke to Otto Piene, New York, March 21, 1963, archive of the ZERO foundation, estate of Otto Piene, inv. no. mkp.ZERO.2.I.1345.

[ii] Hans Haacke to Otto Piene, Philadelphia, September 8, 1962, archive of the ZERO foundation, estate of Otto Piene, inv. no. mkp.ZERO.2.I.1344.

[iii] Hans Haacke to Otto Piene, Philadelphia, September 8, 1962, archive of the ZERO foundation, estate of Otto Piene, inv. no. mkp.ZERO.2.I.1344.

[iv] The nineteen-sixties is considered the decade in which Pop Art established itself in the art market and institutions, and spread throughout Europe. Pop Art, which predominantly focused on consumption, was advantaged by John F. Kennedy’s economic policy, which was based on the idea that the stability of the economy could be maintained by stimulating each and every individual to engage in consumption. See Brüning 2022 (see note 6), pp. 163–64; Willi Paul Adams, Die USA im 20. Jahrhundert (Munich, 2008), pp. 83–84.

[v] See Hans Haacke to Otto Piene, Hempstead, New York, July 18, 1963, archive of the ZERO foundation, estate of Otto Piene, inv. no. mkp.ZERO.2.I.1869.

Günther Uecker, Otto Piene, and Heinz Mack were also represented in US exhibitions before 1964. In fact, Hermann Warner Williams, the director of the Corcoran Gallery of Art, Washington, DC, had already contacted Otto Piene as early as February 1962, as he had been commissioned to select artworks for the International Exhibition of Modern Art, supported by the Federal Republic of Germany.[i]

[i] See Hermann Warner Williams to Otto Piene, Washington, DC, February 27, 1962, archive of the ZERO foundation, estate of Otto Piene, inv. no. mkp.ZERO.2.I.695.

Letter from Hermann Warner Williams Jr., The Corcoran Gallery of Art, Washington, DC, to Otto Piene, February 27, 1962, archive of the ZERO foundation, estate of Otto Piene, inv. no. mkp. ZERO.2.I.695

This exhibition, titled Sixteen German Artists (announced as Fifteen German Artists by Warner Williams), was displayed at several US institutions from 1962 to 1963.[i] Piene was represented with five artworks: Smoke Painting, Red (1961); Wave of Darkness (1961); Smoke Painting #1 (1962); Smoke Painting #2 (1962); and Light Ballet (1962).[ii] In the exhibition catalog the Smoke Paintings were titled Pulse, Pulse, Impulse (1961); Fire Flower (1962); and Sun Result (1962). Piene’s Light Ballet suffered damage on more than one occasion, first in the Corcoran Gallery and later in the Addison Gallery of American Art at the Phillips Academy, Andover, Massachusetts.[iii]

[i] See exh. cat. Sixteen German Artists, 1962, archive of the ZERO foundation, estate of Heinz Mack, inv. no. mkp.ZERO.1.VII.254.

[ii] See Hermann Warner Williams to Otto Piene, Washington, DC, July 20, 1962, archive of the ZERO foundation, estate of Otto Piene, inv. no. mkp.ZERO.2.I.697.

[iii] “The Exhibition is presently at Andover, and I would be grateful if you could send replacements for the two parts AS SOON AS POSSIBLE.” Donelson F. Hoopes to Otto Piene, Washington, DC, March 7, 1963, archive of the ZERO foundation, estate of Otto Piene, inv. no. mkp.ZERO.2.I.1352.

Letter from Hermann Warner Williams Jr., The Corcoran Gallery of Art, Washington, DC, to Otto Piene, July 20, 1962, archive of the ZERO foundation, estate of Otto Piene, inv. no. mkp.ZERO.2.I.697
List of works for the Corcoran Gallery of Art by Otto Piene, Washington, DC, archive of the ZERO foundation, estate of Otto Piene, inv. no. mkp.ZERO.2.I.694

Heinz Mack was also involved in this exhibition, as evidenced by a letter from the Embassy of the Federal Republic of Germany in Washington, DC, in December 1962, thanking him for participating. The exhibition catalog lists five of his works, all of which were lent by Galerie Schmela: Dynamic Structure in White (1960); White Oval (1960); Dynamic Structure in White on Black (1961); Light Relief (1961–62); and Dynamic Structure in Black (1962).[i]

Both Mack and Piene were awarded prizes at the fourth Guggenheim International Award Exhibition in 1964, which was funded by the Solomon R. Guggenheim Museum in New York. The traveling exhibition showcased the work of artists from all over the world; however, the number of artists from each country was restricted to five.[ii]

[i] See Dr. Hanns-Erich Haack to Heinz Mack, Washington, D.C., December 6, 1962, archive of the ZERO foundation, estate of Heinz Mack, inv. no. mkp.ZERO.1.94.

[ii] The Guggenheim International Award (GIA) was established in 1956 and held every two years, with the exhibition traveling to two further American cities.

Letter from Lawrence Alloway, The Solomon R. Guggenheim Museum, to Galerie Schmela, August 21, 1963, archive of the ZERO foundation, estate of Otto Piene, inv. no. mkp. ZERO.2.I.1950_2
Letter from Dalzell Hatfield Galleries to Heinz Mack, Los Angeles, November 20, 1963, archive of the ZERO foundation, estate of Heinz Mack, inv. no. mkp.ZERO.1.157

The museum’s curator, Lawrence Alloway, was a close observer of the European art scene. For the exhibition, he chose Piene’s Pink Fire Flower (1963),[i] and Heinz Mack’s, Cardiogram of the Cyclops (1961–62) after visiting Düsseldorf in August 1963 for the examination of Piene’s work.[ii] In addition, in late 1963 the Dalzell Hatfield Gallery expressed interest in Heinz Mack’s sculpture Teller-Object (Plate Object), and offered him an exhibition platform, while Piene was selected by Alloway for a second exhibition at the Guggenheim in the same year.[iii]

A work by Uecker in the collection of the American artist George Rickey was shown in the group exhibition On the Move: Kinetic Sculptures (1964) at the Howard Wise Gallery. In the following year, Uecker was represented in eight group exhibitions in America. Among other presentations, his works were featured as part of the Rickey Collection at the Albany Institute of History and Art, New York, at the Blanton Museum of Art at the University of Texas, Austin—which presented An Exhibition of Retinal and Perceptual Art—and in the exhibition Quantum 1 at the Sachs Galleries, New York.[iv]

Piero Dorazio (1927–2005), who belonged to the extended ZERO circle, was at that time teaching at the University of Pennsylvania. He had already spent a year in America in 1953, and took up a teaching position at Penn in 1959. On an undated postcard, he informed Piene that he had suggested him for a semester’s stay at the university.

[i] See Hillings 2002 (see note 15), p. 220; Lawrence Alloway to Otto Piene, New York, August 8, 1963, archive of the ZERO foundation, estate of Otto Piene, inv. no. mkp.ZERO.2.I.1949_2.

[ii] See Lawrence Alloway to Otto Piene, New York, August 21, 1963, archive of the ZERO foundation, estate of Otto Piene, inv. no. mkp.ZERO.2.I.1950_2.

[iii] See D. Hatfield to Heinz Mack, Los Angeles, November 20, 1963, archive of the ZERO foundation, estate of Heinz Mack, inv. no. mkp.ZERO.1.157. In the event, the exhibition at the Guggenheim was postponed, or rather split into two parts: a show of American graphic art followed by a show of works by European artists. See Solomon R. Guggenheim Museum to Otto Piene, New York, April 9, 1964, estate of Otto Piene, inv. no. mkp.ZERO.2.I.1954.

[iv] See Hillings 2002 (see note 15), p. 220.

Postcard from Piero Dorazio to Otto Piene (front and back), Philadelphia, archive of the ZERO foundation, estate of Otto Piene, inv. no. mkp.ZERO.2.I.1471
Postcard from Piero Dorazio to Otto Piene (front and back), Philadelphia, archive of the ZERO foundation, estate of Otto Piene, inv. no. mkp.ZERO.2.I.1471

A letter from the university dated March 5, 1964, indicates that the institution had already tried to engage Piene as a guest lecturer for the 1963 fall/winter semester.[i] Unfortunately, he had had to decline due to lack of time:

[i] See Piero Dorazio to Otto Piene, Philadelphia, undated, archive of the ZERO foundation, estate of Otto Piene, inv. no. mkp.ZERO.2.I.1471; Thomas B. A. Godfrey, Philadelphia, June 20, 1963, archive of the ZERO foundation, estate of Otto Piene, inv. no. mkp.ZERO.2.I.1977_2.

“Last year we wrote you, too late I am afraid to enable you to make plans for a visit to Philadelphia in the Fall of 1963. We were very disappointed that you were unable to come, and I am again writing in the hope that we may interest you in spending one term with us as Visiting Critic in Painting […].”[i]

[i] George Holmes Perkins to Otto Piene, Philadelphia, March 5, 1964, archive of the ZERO foundation, estate of Otto Piene, inv. no. mkp.ZERO.2.I.2388. See also the letter from the University of July 19, 1963, in which Thomas B. A. Godfrey expresses his disappointment over Piene’s cancellation, archive of the ZERO foundation, estate of Otto Piene, inv. no. mkp.ZERO.2.I.1973_2; and the draft of Piene’s letter of cancellation, citing a lack of time to prepare, estate of Otto Piene, inv. no. mkp.ZERO.2.I.1975_1.

During Piene’s time in Philadelphia, Mack was invited to the university for a day to present his Sahara Project: “I understand from Otto that you will be in this country during the month of November and if you are in New York and can visit us at the School for a day, we should be happy.”[i]

[i] Thomas B. A. Godfrey to Heinz Mack, Philadelphia, October 1, 1964, archive of the ZERO foundation, estate of Heinz Mack, inv. no. mkp.ZERO.1.I.965; Heinz Mack to Thomas B. A. Godfrey, October 17, 1964, estate of Heinz Mack, inv. no. mkp.ZERO.1.I.966.

Catalogue of the exhibition Group Zero with a work by Robert Indiana, Institute of Contemporary Art, Philadelphia, University of Pennsylvania, 1964, archive of the ZERO foundation, estate of Otto Piene, inv. no. mkp. ZERO.2.VII.33
Letter from Thomas B. A. Godfey, University of Pennsyl- vania, Philadelphia, to Heinz Mack, November 2, 1964, archive of the ZERO foundation, estate of Heinz Mack, inv. no. mkp. ZERO.1.I.967

By this point in time, ZERO had arrived in America. Almost at the same time as the exhibition in Pennsylvania, gallery owner Howard Wise presented the first exhibition of the triumvirate Mack, Piene, and Uecker in his New York space.[i] Heinz Mack’s pronouncement, “New York now or never!,”[ii] proved to be true. Philadelphia was followed by a new phase for some of the artists, in which they enjoyed far greater participation in exhibitions in the USA. Up to this point, German postwar art had gone relatively unnoticed in America. In Valerie Hillings’s opinion, “the interest in the show by the press marked a shift in American attitudes towards German art.”[iii]

[i] See Thekla Zell, “The ZERO Traveling Circus: Documentation of Exhibitions, Actions, Publications 1958–1966,” in Dirk Pörschmann and Margriet Schavemaker, eds., ZERO: Die internationale Kunstbewegung der 50er und 60er Jahre (ZERO: The International Art Movement of the 1950s and 1960s), exh. cat. Martin-Gropius-Bau and Stedelijk Museum (Berlin, Amsterdam, and Cologne, 2015), p. 132.

[ii] See Stachelhaus 1993 (as in note 1) p. 160.

[iii] For further information about ZERO and the USA, see Rivers Ryan 2015 (see note 1); Kuhn 1991 (see note 1), pp. 51–52; Hillings 2002 (see note 15), p. 223.

This text has been translated from German into English by Gloria Custance.

Postcard from Otto Piene to Heinz Mack (front and back), Philadelphia, September 10, 1964, archive of the ZERO foundation, estate of Heinz Mack, inv. no. mkp.ZERO.1.I.969
Postcard from Otto Piene to Heinz Mack (front and back), Philadelphia, September 10, 1964, archive of the ZERO foundation, estate of Heinz Mack, inv. no. mkp.ZERO.1.I.969
Installation view of the exhibition Zero, Howard Wise Gallery, New York, 1964, archive of the ZERO foundation, estate of Heinz Mack, mkp.ZERO.1.V.63, photo: Heinz Mack

Endnotes

Heinz Mack, ZERO-Wecker , 1961/Artist15 x 13 x 6 cm, alarm clock with collage, ZERO foundation, Düsseldorf, Invent.-No. mkp.ZERO.2008.12, photo: Horst Kolberg
zerofoundation.de/en/zero-wecker-2/
  ZERO-Kurzbiografie Uli Pohl Der am 28. Oktober 1935 in München geborene Uli Pohl studiert von 1954 bis 1961 bei Ernst Geitlinger Malerei an der Akademie der Bildenden Künste in München. 1961 lädt Udo Kultermann den Absolventen zur Teilnahme an der Ausstellung 30 junge Deutsche im Schloss Morsbroich in Leverkusen ein. An dieser sind auch Heinz Mack, Otto Piene und Günther Uecker beteiligt. Es dauert nicht lange, da wird er in der Zeitschrift ZERO vol. 3 als DYNAMO POHL aufgenommen und von da an gehören seine Werke zu den ZERO-Ausstellungen. Pohls künstlerisches Wahlmaterial war lange Z
zerofoundation.de/uli-pohl/
  ZERO-Kurzbiografie Adolf Luther   Adolf Luther wird am 25. April 1912 in Krefeld-Uerdingen geboren. Er starb am 20. September 1990 in Krefeld. Nach seinem Jurastudium in Bonn, welches er 1943 mit seiner Promotion abschließt, ist er zunächst bis 1957 als Richter in Krefeld und Minden tätig. Bereits während des Krieges beginnt Luther sich mit der Malerei auseinanderzusetzen, zugunsten der er seinen Beruf als Richter aufgibt, und versucht durch gestisch-informelle Malerei traditionelle Strukturen zu überwinden. 1959 entstehen seine ersten ausschließlich schwarzen Materiebilder, dere
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  Short ZERO-Biography of Adolf Luther   Adolf Luther was born in Krefeld-Uerdingen on April 25, 1912. He died in Krefeld on September 20, 1990. After studying law in Bonn, which he completed with his doctorate in 1943, he initially worked as a judge in Krefeld and Minden until 1957. Already during the war Luther begins to explore painting, in favor of which he gives up his job as a judge, and tries to overcome traditional structures through gestural-informal painting. In 1959 he created his first exclusively black Materiebilder (matter paintings), whose relief protrudes into three
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  ZERO-Kurzbiografie Almir Mavignier   Almir Mavignier, geboren am 01. Mai 1925 in Rio de Janeiro, Brasilien, gestorben am 03. September 2018 in Hamburg, war Maler und Grafiker. Er studiert ab 1946 Malerei in Rio de Janeiro und malt drei Jahre später bereits sein erstes abstraktes Bild. 1951 zieht er nach Paris und von dort aus weiter nach Ulm, wo er bis 1958 an der Hochschule für Gestaltung bei Max Bill und Josef Albers studiert. In dieser Zeit entstehen seine ersten Punkt-Bilder sowie erste Rasterstrukturen, die seine Verbindung zur Konkreten Kunst aufzeigen. Ab 1958 beteiligt Ma
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Short ZERO-Biography of Almir Mavignier   Almir Mavignier, born May 01, 1925 in Rio de Janeiro, Brazil, died September 03, 2018 in Hamburg, was a painter and graphic artist. He studied painting in Rio de Janeiro from 1946 and already painted his first abstract painting three years later. In 1951 he moved to Paris and from there on to Ulm, where he studied at the Hochschule für Gestaltungwith Max Bill and Josef Albers until 1958. During this time he created his first dot paintings as well as his first grid structures, which show his connection to Concrete Art. From 1958 Mavignier partici
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ZERO-Kurzbiografie Christian Megert Christian Megert wird am 06. Januar 1936 in Bern geboren, wo er von 1952 bis 1956 die Kunstgewerbeschule besucht. Bereits 1956 stellt er in seiner ersten Ausstellung in Bern weiß-in-weiß gemalte Strukturbilder aus. Nach Aufenthalten in Stockholm, Berlin und Paris, bei denen er sich international behaupten kann, kehrt er 1960 in die Schweiz zurück. In diesem Jahr macht er Bekanntschaft mit den Künstler*innen der ZERO-Bewegung, an deren Ausstellungen er sich mit Environments, Spiegelobjekten und kinetischen Objekten beteiligt. Christian Megerts primäres künstlerisches Gestaltungsmittel ist der Spiegel, den er bereits zu Beginn seiner Karriere für sich entdeckt und mit dem er den Raum erforscht. In seinem Manifest ein neuer raum (1961) beschwört der Künstler seinen idealen Raum ohne Anfang und Ende. Seit 1973 ist Christian Megerts Domizil Düsseldorf, wo er von 1976 bis 2002 die Professur für Integration Bildende Kunst und Architektur an der Kunstakademie innehat. Weiterführende Literatur: Anette Kuhn, Christian Megert. Eine monographie,Wabern-Bern 1997. Foto: Harmut Rekort, Ausstellung "Christian Megert. Unendliche Dimensionen", Galerie d, Frankfurt, 1963
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  Short ZERO-Biography of Christian Megert   Christian Megert was born on January 6, 1936 in Bern, where he attended the School of Applied Arts from 1952 to 1956. Already in 1956 he exhibits in his first exhibition in Bern white-in-white painted structural pictures. After residencies in Stockholm, Berlin and Paris, where he was able to establish himself internationally, he returned to Switzerland in 1960. In this year he became acquainted with the artists of the ZERO movement, in whose exhibitions he participated with environments, mirror objects and kinetic objects. Christian Mege
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  ZERO-Kurzbiografie Daniel Spoerri   Daniel Spoerri, geboren am 27. März 1930 in Galati, Rumänien, studiert zunächst Tanz und ist zwischen 1952 und 1957 als Balletttänzer in Paris und Bern tätig. Bereits 1956 wendet er sich aber allmählich vom Tanz ab, und, nach einer kurzen Episode als Regieassistent, der bildenden Kunst zu. 1959 nimmt er mit seinem Autotheater an der Ausstellung Vision in Motion – Motion in Vision im Antwerpener Hessenhuis teil, an der auch Heinz Mack und Otto Piene beteiligt sind. Viele der späteren ZERO-Künstler beteiligten sich an seiner Edition MAT (1959), d
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  Short ZERO-Biography of Daniel Spoerri   Daniel Spoerri, born on March 27, 1930 in Galati, Romania, initially studied dance and worked as a ballet dancer in Paris and Bern between 1952 and 1957. As early as 1956, however, he gradually turned away from dance and, after a brief episode as an assistant stage director, toward the visual arts. In 1959 he participates with his Autotheater in the exhibition Vision in Motion – Motion in Vision in the Antwerp Hessenhuis, in which Heinz Mack and Otto Piene are also involved. Many of the later ZERO artists participated in his Edition
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  ZERO-Kurzbiografie von Günther Uecker Günther Uecker, geboren am 13. März 1930 in Wendorf, Mecklenburg, lebt und arbeitet in Düsseldorf. Nach einem Studium der angewandten Kunst in Wismar und später in Berlin/Weißensee siedelte er 1953 in die Bundesrepublik Deutschland über. Von 1955 bis 1957 studierte er an der Kunstakademie Düsseldorf, an der er dann von 1974 bis 1995 als Professor tätig wurde. 1958 nahm Günther Uecker an der 7. Abendausstellung „Das rote Bild“ teil, die von Heinz Mack und Otto Piene in der Gladbacher Straße 69 in Düsseldorf organisiert wurde. 1961 beteiligte er sic
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Short ZERO biography of Günther Uecker Günther Uecker was born on 13 March 1930 in Wendorf and lives and works in Düsseldorf. After his studies of applied arts in Wismar and later also in Berlin/Weißensee, Uecker moved to the Federal Republic of Germany in 1953. From 1955 to 1957, he studied at the Kunstakademie (Academy of Arts) Düsseldorf, where he later worked at as a professor from 1974 to 1995. In 1958, Günther Uecker participated in the seventh “Abendausstellung” (evening exhibition), organised by Heinz Mack and Otto Piene at Gladbacher Straße 69 in Düsseldorf and called “D
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ZERO-Kurzbiografie von Heinz Mack Heinz Mack, am 8. März 1931 im hessischen Lollar geboren, lebt und arbeitet in Mönchengladbach und auf Ibiza. Er studierte von 1950 bis 1956 Malerei an der Kunstakademie Düsseldorf, wo er Otto Piene kennenlernte, sowie Philosophie an der Universität zu Köln. 1957 initiierte er zusammen mit Otto Piene die sogenannten „Abendausstellungen“, die jeweils nur für einen Abend in den Atelierräumen der zwei Künstler in der Gladbacher Straße 69 zu sehen waren. 1958 gründete Heinz Mack mit Otto Piene die Zeitschrift „ZERO“, die einer ganzen internationalen Kunst
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Short ZERO biography of Heinz Mack Heinz Mack was born on 8 March 1931 in Lollar in Hesse and currently lives and works in Mönchengladbach and Ibiza. From 1950 to 1956, he studied the art of painting at the Kunstakademie [Academy of Arts] in Düsseldorf, where he met Otto Piene, as well as philosophy at the University of Cologne. In 1957, Mack, together with Piene, initiated the so-called “Abendausstellungen” [Evening exhibitions], which were only on display for one evening respectively. The exhibitions could be viewed inside the studio space of the two artists, located at Gladbacher S
zerofoundation.de/en/heinz-mack-2/
Otto Piene, Sketch for the slide installation “Lichtballett ‘Hommage à New York'” , 1966Inv.-Nr.: mkp.ZERO.2.IV.90, Nachlass Otto Piene, ZERO foundation, Düsseldorf Otto Piene conceived the "Li...
zerofoundation.de/en/sketch-for-the-slide-installation-lichtballett-hommage-a-new-york/
Otto Piene, Entwurf für die Dia-Installation „Lichtballett ‚Hommage à New York'“ , 1966Inv.-Nr.: mkp.ZERO.2.IV.90, Nachlass Otto Piene, ZERO foundation, Düsseldorf Otto Piene konzipierte das "L...
zerofoundation.de/entwurf-fuer-die-dia-installation-lichtballett-hommage-a-new-york/
Kurzbiografie Nanda Vigo Nanda Vigo, am 14. November 1936 in Mailand geboren und am 16. Mai 2020 ebenda gestorben, war Designerin, Künstlerin, Architektin und Kuratorin. Nachdem sie einen Abschluss als Architektin am Institut Polytechnique, Lausanne, sowie ein Praktikum in San Francisco absolvierte, eröffnet sie 1959 ihr eigenes Studio in Mailand. In diesem Jahr beginnen ihre Besuche in Lucio Fontanas Atelier und sie lernt Piero Manzoni und Enrico Castellani kennen. Zudem reist sie für verschiedenste Ausstellungen durch Europa und lernt so die Künstler*innen und Orte der ZERO-Bewegung in Deu
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  Short ZERO-Biography of Nanda Vigo   Nanda Vigo, born in Milan on November 14, 1936, where she died on May 16, 2020, was a designer, artist, architect and curator. After graduating as an architect from the Institut Polytechnique, Lausanne, and an internship in San Francisco, she opened her own studio in Milan in 1959. In this year her visits to Lucio Fontana’s studio begin and she meets Piero Manzoni and Enrico Castellani. She also travels through Europe for various exhibitions and gets to know the artists and places of the ZERO movement in Germany, France and Holland. In 1
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Short ZERO-Biography of Oskar Holweck   Oskar Holweck was born in St. Ingbert, Saarland, on November 19, 1924, and died there on January 30, 2007. Except for a few years of study in Paris, he remained loyal to the Saarland. He taught at the State School of Arts and Crafts and at the State School of Applied Arts in Saarbrücken. He turned down appointments at other art schools and invitations to the documenta exhibitions of 1959 and 1972. However, he takes part in the numerous exhibitions of the ZERO group. From 1958 on, he exhibited with its protagonists all over the world. At the begin
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ZERO-Kurzbiografie Oskar Holweck   Oskar Holweck wurde am 19. November 1924 in St. Ingbert im Saarland geboren und ist am 30. Januar 2007 ebenda verstorben. Bis auf einige Studienjahre in Paris bleibt er dem Saarland treu. Er lehrt an der Staatlichen Schule für Kunst und Handwerk sowie an der Staatlichen Werkkunstschule in Saarbrücken. Berufungen an andere Kunstschulen und Einladungen zu den documenta-Ausstellungen von 1959 und 1972 lehnt er ab. An den zahlreichen Ausstellungen der ZERO-Gruppe nimmt er aber teil. Ab 1958 stellt er mit ihren Protagonist*innen in der ganzen Welt aus. Zu
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  ZERO-Kurzbiografie von Otto Piene Otto Piene wurde am 18. April 1928 in Laasphe (Westfalen) geboren und starb am 17. Juli 2014 in Berlin. Nach zwei Jahren in München studierte er von 1950 bis 1957 Malerei an der Kunstakademie Düsseldorf sowie Philosophie an der Universität zu Köln. 1957 initiierte Otto Piene zusammen mit Heinz Mack, den er an der Kunstakademie kennengelernt hatte, die sogenannten „Abendausstellungen“, die jeweils nur für einen Abend in den Atelierräumen der zwei Künstler in der Gladbacher Straße 69 zu sehen waren. 1958 gründete er mit Heinz Mack die Zeitschrift „ZERO“
zerofoundation.de/otto-piene/
  Short ZERO biography of Otto Piene Otto Piene was born on 18 April 1928 in Laasphe (Westphalia) and died on 17 July 2014 in Berlin. After spending two years in Munich, he studied the art of painting at the Kunstakademie [Academy of Arts] in Düsseldorf from 1950 to 1957, as well as philosophy at the University of Cologne. In 1957, Otto Piene, together with Heinz Mack, initiated the “Abendausstellungen”, which were only on display for one evening respectively. The artists had met in the Kunstakademie and the exhibitions could be viewed in their joint studio space, located at Gladbacher
zerofoundation.de/en/otto-piene-2/
Heinz Mack, Rotor für Lichtgitter , 1967Rotor: 141,5 x 141,5 x 25 cm, Sockel: 60 x 125 x 35 cm, Aluminium, Plexiglas, Spanplatte, Motor, ZERO foundation, Düsseldorf, Invent.-Nr. mkp.ZERO.2009.03, Foto: Weiss-Henseler
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Heinz Mack, Rotor für Lichtgitter, 1967, rotor: 141,5 x 141,5 x 25 cm, base: 60 x 125 x 35 cm, aluminum, acrylic glass, wood (chipboard), motor, ZERO foundation, Düsseldorf, Invent.-No. mkp.ZERO.2009.03, photo: Weiss-Henseler
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Günther Uecker, Sandmühle, 1970/2009, 50 x 60 x 400 (dia) cm, cords, wood, electric motor, sand, ZERO foundation, Düsseldorf, Invent.-No. mkp.ZERO.2008.66, photo: ZERO foundation, Düsseldorf and Pohang Museum of Steel Art, Pohang
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Günther Uecker, Sandmühle , 1970/200950 x 60 x 400 (dia) cm, Bindfäden, Holz, Elektrikmotor, Sand, ZERO foundation, Düsseldorf, Invent.-Nr. mkp.ZERO.2008.66, Foto: ZERO foundation, Düsseldorf and Pohang Museum of Steel Art, Pohang                                                                                                                                                           
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Heinz Mack, Siehst du den Wind? (Gruß an Tinguely), 1962, 204 x 64 x 40 cm, Aluminium, Eisen, Elektrik, Motor, Kunststoffbänder, Klebeband, ZERO foundation, Düsseldorf, Invent.-Nr. mkp.ZERO.2008.16, Foto: N.N.
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Heinz Mack, Siehst du den Wind? (Gruß an Tinguely), 1962, 204 x 64 x 40 cm, aluminum, iron, electrical system, motor (220 V), plastic ribbons, tape, ZERO foundation, Düsseldorf, Invent.-No. mkp.ZERO.2008.16, photo: N.N.
zerofoundation.de/en/siehst-du-den-wind-gruss-an-tinguely/
Günther Uecker, Sintflut (Die Engel Fliegen), 1963, 89 x 62.5 cm (framed: 102 x 72.5 cm), b/w photographic prints, newspaper clippings, handmade paper, ZERO foundation, Düsseldorf, inventory no.: FK.ZERO.2023.03, photo: Matias Möller
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Günther Uecker, Sintflut (Die Engel Fliegen), 1963, 89 x 62,5 cm (gerahmt: 102 x 72,5 cm), SW-Fotoabzüge, Zeitungsausschnitte, Büttenpapier, ZERO foundation, Düsseldorf, Invent.-Nr.: FK.ZERO.2023.03, Foto: Matias Möller
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Short ZERO-Biography of  Uli Pohl   Born in Munich on October 28, 1935, Uli Pohl studied painting under Ernst Geitlinger at the Academy of Fine Arts in Munich from 1954 to 1961. In 1961, Udo Kultermann invites the graduate to participate in the exhibition 30 junge Deutsche (30 Young Germans) at Morsbroich Castle in Leverkusen. Heinz Mack, Otto Piene and Günther Uecker are also involved in this. It is not long before he is included in the magazine ZERO vol. 3 as DYNAMO POHL and from then on his works are part of the ZERO exhibitions. Pohl’s artistic material of choice has for a lon
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  ZERO-Kurzbiografie Walter Leblanc   Walter Leblanc, geboren am 26. Dezember 1932 in Antwerpen, gestorben am 14. Januar 1986 in Brüssel, studierte von 1949 bis 1954 an der Königlichen Akademie für Schöne Künste in Antwerpen. 1958 wird er zu einem der Gründungsmitglieder der Künstlergruppe G58 Hessenhuis. Ein Jahr später taucht das erste Mal die Torsion als Gestaltungsmittel in seinen Werken auf, die zu dem bestimmenden Merkmal seiner Kunst wird. Mithilfe von Windungen und Verdrehungen von Papier, Karton oder Fäden werden dreidimensionale Strukturen geschaffen, die auch in skulptur
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  Short ZERO-Biography of Walter Leblanc   Walter Leblanc, born December 26, 1932 in Antwerp, died January 14, 1986 in Brussels, studied at the Royal Academy of Fine Arts (Königliche Akademie für Schöne Künste) in Antwerp from 1949 to 1954. In 1958 he became one of the founding members of the artist group G58 Hessenhuis. A year later, torsion appeared for the first time as a design element in his works, and it became the defining characteristic of his art. With the help of twists and turns of paper, cardboard or threads, three-dimensional structures are created, which are also tran
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Otto Piene, Weißer Lichtgeist , 1966220 x Ø 60 cm, crystal glass, metal, bulb, timer, ZERO foundation, Düsseldorf, Invent.-No. mkp.ZERO.2012.06, photo: Marcus Schwier
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Otto Piene, Weißer Lichtgeist, 1966, 220 x Ø 60 cm, Kristallglas, Metall, Glühbirnen, Zeitschaltung, ZERO foundation, Düsseldorf, Invent.-Nr. mkp.ZERO.2012.06, Foto: Marcus Schwier
zerofoundation.de/weisser-lichtgeist/
Heinz Mack, ZERO-Rakete für „ZERO“, Nr. 3, 1961, Inv.-Nr.: mkp.ZERO.2.VI.30, Nachlass Otto Piene, ZERO foundation, Düsseldorf
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Heinz Mack, ZERO rocket for “ZERO”, no. 3, 1961, Inv.-Nr.: mkp.ZERO.2.VI.30, Nachlass Otto Piene, ZERO foundation, Düsseldorf
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Heinz Mack, ZERO-Wecker, 1964, 15 x 13 x 6 cm, Wecker mit Collage, ZERO foundation, Düsseldorf, Invent.-Nr. mkp.ZERO.2008.12, Foto: Horst Kolberg
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