A 1956 proposal drafted by Skidmore, Owings & Merrill for the Union Carbide Building, a historically significant, mid-twentieth century office tower located at 270 Park Avenue, just north of Grand Central Station. The proposal consists of reproductions of plan and elevation drawings and photographs of the Union Carbide model, together with outline specifications, cost estimates, and construction and drawing schedules.

This collection primarily includes black and white and color photographic prints of approximately 100 buildings designed by the American architectural firm Skidmore, Owings & Merrill in locations throughout the United States, circa 1945-1969.