illustration of the UN Headquarters in New York CIty
International Style of Architecture, the UN Headquarters, 1999

Illustrator: Howard Koslow

The UN Headquarters is an example of the International Style of architecture, characterized by rectilinear forms, glass and steel, flat roofs, and open interior spaces. Popular in Europe and the US in the 1920s and 1930s, this architectural style was well-suited for large urban projects.

Courtesy United States Postal Service, Postmaster General's Collection