Dan Arje (1923-1993) was a designer and display director for Bonwit Teller. The collection primarily consists of albums of photographs and news clippings about Arje's displays, and correspondence regarding his decorating work for the White House during the Kennedy and Johnson administrations, including decoration of the White House Christmas tree. Also present are materials about Bonwit Teller and Tiffany's designer Gene Moore.

Interior design sketches and detail studies from Daniel Lashen's studies at Parsons School of Design in New York and in Italy. Lashen graduated from Parsons in 1950.

Dero Darwin, Jr. (1929-2014) graduated from Parsons School of Design's Interior Design Department in 1964. This collection includes design work Darwin produced as a student, as well as lecture notes and course materials, and material from Darwin's professional design career.

Donald Brooks (1928-2005) was a prominent American fashion designer who, in addition to creating ready-to-wear collections and custom apparel, designed costumes for film, television, and theater. He taught at Parsons School of Design for approximately forty years. The collection includes photographs, publicity materials, and original fashion and costume design sketches.

Dora Mathieu (1909-1980) taught fashion drawing in the Parsons School of Design Fashion Illustration Department, 1964-1966. The Kellen Design Archives holds twenty-nine of Mathieu's sketches, depicting notable designers of the mid-twentieth century. Although the earliest dated portrait is from 1938, the bulk of the collection was created between 1965 and 1968.

Dorothy Haon (1898-1995) attended the New York School of Fine and Applied Art (later, Parsons School of Design) in 1923-1924, and went on to careers in fashion design and merchandising. The collection, which spans the late 1930s through the 1950s, includes working sketches and notes, cloth patterns, fabric samples, and business records. Also included is work by Dorothy's sister, Marion Haon.

A drawing of a male nude by Parsons School of Design alumnus and president Van Day Truex, formerly owned by Harry and Dorothy Kneedler Lawenda.

Edith d'Errecalde (1905-2002) worked for Mainbocher in the 1940s and started her own sportswear firm, Maxmil, in 1951. Later d'Errecalde worked for Evan-Picone and as fashion director for Cohama (Cohn-Hall-Marx). The collection contains photographs, sketches, clippings, advertisements, press kits, correspondence, and notes for articles and lectures. D'Errecalde was a critic and lecturer at Parsons School of Design, 1969-1970.

Edward Wormley (1907-1995) is often cited as a top designer of American modernist furniture. Starting at the Dunbar Furniture Company at age 23, Wormley eventually became its sole designer and retained a partnership with Dunbar for over thirty years. Wormley taught at Parsons School of Design between 1952 and 1970. The collection includes photographs, slides, subject files, clippings, technical drawings, catalogs, and sketches.

Consists of two drawings of period rooms rendered in pen and ink and watercolor.