JUMP MENU UPPER MANHATTAN • Upper East • Central Park • Upper West MIDTOWN • Grand Central Station • Rockefeller Center • Times Square • Empire State Building LOWER MANHATTAN • Greenwich Village • SOHO • Chinatown • South Street Seaport • Finaicial District • Battery Park NY Tours in 3 Minutes SPECIAL TOURS SLIDESHOW TOURS

United Nations (UN) Headquarters Building. The Headquarters consist of four main buildings: the General Assembly building, the Conference Building, the 39-floor Secretariat building, and the Dag Hammarskjold Library, which was added in 1961. The complex was designed by an international team of 11 architects, led by Wallace K. Harrison from the United States.