Letters to Bucci, works of art, a photograph, and printed material.

The papers of Artforum editor and educator Philip Leider measure 0.4 linear feet and date from circa 1962 to 1997, bulk dates 1965 to 1971. The papers consist of Leider's correspondence with Michael Fried, Barbara Rose, Frank Stella, Dan Flavin, and Clement Greenberg. Correspondence, both professional and personal, constitutes a majority of the collection and is between Philip Leider and Michael Fried, Barbara Rose, Frank Stella, Dan Flavin, and Clement Greenberg and covers topics such as the writing and publication of articles and reviews in Artforum magazine, anecdotes from parties, gallery openings, lectures and performances attended by Leider and his friends, and critical reactions to events and changes in the art world. Although few in number, writings are included, usually accompanied by a letter explaining the content and style of the manuscript. These are drafts of articles slated for publication in Artforum.

An interview of Sol LeWitt conducted 1974 July 15, by Paul Cummings, for the Archives of American Art.

An interview of Robert Ryman conducted 1972 October 13-November 7, by Paul Cummings, for the Archives of American Art.

Interview of Leo Castelli conducted 1969 May 14-1973 June 8, by Paul Cummings, for the Archives of American Art.

Photographs of artists taken by Seroka.

The papers of New York museum director and independent curator Thomas M. Messer measure 4.6 linear feet and date from 1949-2010. Material includes correspondence, a diary transcript, and printed material that reflect Messer's long career, primarily as director of the Solomon R. Guggenheim Foundation. Correspondence comprises the bulk of the collection and documents the relationships he built with artists, art historians, curators, and others colleagues. Notable correspondents include Francis Bacon, Will Barnet, Larry Bell, Alberto Burri, Pol Bury, Marc Chagall, Chryssa, Jean Dubuffet, Max Ernst, Dan Flavin, Helen Frankenthaler, Alberto Giacometti, Richard Hamilton, Jean Hélion, Grace Knowlton, Rosemarie Koczy, Jirí Kolár, Katharine Kuh, Agnes Martin, Henry Moore, George Rickey, Charles Simonds, Clyfford Still, Jack Tworkov, and many others.

The Samuel J. Wagstaff papers, circa 1932-1985 comprise 6.4 linear feet of correspondence, writings, miscellaneous records, printed material, and photographs documenting Wagstaff's professional and personal relationships with artists and photographers, his career as an art curator, and his position as an important collector of paintings and photographs. Correspondence with artists and others such as curators, arts organizations, galleries, and museums, reflects the diversity of contemporary American art and includes individuals associated with the abstract expressionist, Fluxus, pop, earth, conceptual, and minimalist art movements.

The Barbara Rose papers date from 1962 to circa 1969 and measure 1.4 linear feet. Papers include letters, writings, printed material, interviews with artists, panel discussions, and lectures relating to Barbara Rose's research as an art historian.

The papers of photographer, filmmaker, and painter Rudy Burckhardt measure 5.6 linear feet and date from 1934 to 2015. A bulk of the collection consists of black and white negatives which document over 260 mid-to-late twentieth century modern artists, their work, studios, and/or exhibitions. Notable artists include Willem de Kooning, Dan Flavin, Joseph Cornell, Helen Frankenthaler, Donald Judd, Franz Kline, Roy Lichtenstein, Louise Nevelson, Isamu Noguchi, Frank Stella, and many others. Burckhardt was hired to photograph for a number of New York art galleries such as the Leo Castelli Gallery and Green Gallery; art collectors including Chaim Gross and David Rockefeller; and art magazines such as ARTnews. Personal papers include announcements and an exhibition catalog; clippings; photographs on postcards; and a book, entitled Conversations with Rudy Burckhardt About Everything, by Simon Pettet, 1987. A small but rich addition to the collection dates from 1941-2015 and contains a curriculum vitae; letters from Joe Brainard, Harold Schimmel, and others; writings; one scrapbook dating from World War II containing letters Burckhardt wrote to Edwin Denby; printed announcements and clippings; and one photograph of Burckhardt taken by Yvonne Jacquette.