This collection includes original and reprographic drawings, photographs, project files and office records documenting the professional life of architectural and theatrical lighting designer Abe Feder. Projects represented are primarily in the continental United States, with additional commissions in Canada, Puerto Rico, and Israel. Also included in this collection are substantial correspondence files and "data books" that record essential project information.

New York City Opera (NYCO) was famously dubbed "The People's Opera" by Mayor Fiorello LaGuardia at its founding in 1943. The Opera company's mission is to inspire audiences with innovative and theatrically compelling opera at an affordable price. This collection documents the artistic productions and the daily administrative functions and operations attest to the mission of the company. The materials in this collection consist of administrative and financial records, production files, stage guides, scores, correspondence, programs, photographs, posters, scenery plans, memorabilia, printed materials, and audio and video recordings, dating from 1924 to 2019, with its bulk dating from 1965 to 1991.