year later, Ryman was included in When Attitudes Become Form, a seminal exhibition of works by Minimalist and Conceptual artists organized by the Kunsthalle Bern. His first solo show at a museum was in 1972 at the Guggenheim Museum in New York City, displaying thirty-eight of Ryman’s works from 1965 to 1971. Ryman's works were represented in documentas 5 (1972), 6 (1977), and 7 (1982), in Kassel, in the Venice Biennale (1976, 1978, 1980 and 2007), and in the Whitney Biennial (1977, 1987, 1995). His first retrospective was organized by the Stedelijk Museum, Amsterdam, in 1974. In 1993-94, the largest retrospective to date of Ryman's paintings, curated by Robert Storr, was exhibited at the Tate Gallery, Museo Nacional Centro de Arte Reina Sofia in Madrid, the Museum of Modern Art in New York, the San Francisco Museum of Modern Art, and the Walker Art Center in Minneapolis. Robert Ryman is represented by David Zwirner. Collections The Hallen für Neue Kunst, a former contemporary art museum in Schaffhausen, Switzerland (closed in 2014) had the largest public collection of Ryman's work, permanently exhibiting 29 pieces created from 1959 to 2007. In 2008 Ryman undertook a major reinstallation of his galleries at Hallen für Neue Kunst. Returning to the museum in 2008 — for the first time in 12 years — to revisit the permanent exhibition of his work that was first installed in 1983, he decided to transform the galleries into a “Gesamtkunstwerk” — a synthesis, or total experience, composed of 32 paintings from 50 years of work. In 2017, Ryman donated 21 painting to the Dia Art Foundation’s permanent collection, making it the only site with an extensive permanent grouping, featuring works made as early as the late 1950s and continuing up to 2003. Other major museums collecting his works include the Museum of Modern Art, New York; the Tate, London; the Art Institute of Chicago and the Stedelijk Museum in Amsterdam. Recognition and reception A recipient of numerous honors, Ryman was awarded a John Simon Guggenheim Foundation Scholarship (1973), the Skowhegan Medal from the Skowhegan School of Painting and Sculpture (1985). He was a member of the American Academy of Arts and Letters after 1994, and assumed the role of the organization’s Vice President in 2003. In 2005, Ryman was awarded the Praemium Imperiale. 2009 saw the publication of Robert Ryman: Critical Texts Since 1967, edited by Vittorio Colaizzi and