United Nations Headquarters (UNO Buildings)
The address: 1st Avenue, New York. Erected in 1947-53; projected by Le Corbusier, Oscar Niemeyer, Sir Howard Robertson with Harrison & Abramovitz. United Nations Headquarters is the only Le Corbusier building in New York; it starred in the Fountainhead film. A massive slab block is the main building - Secretariat, 39-floor office tower - that rises up by the East River, located near the UN Plaza.

Seagram Building
The address: 375 Park Avenue, New York. Erected in 1954-58; projected by Ludwig Mies van der Rohe, Philip Johnson. Barcelona Pavilion is another building by Mies van der Rohe. In 1955 Philip Johnson became an associate for Mies van der Rohe on the Seagram Building: he worked on interiors such as the Four Seasons Restaurant.

UN Plaza
The address: East 44th St / 1st Avenue. Erected in 1969-75; projected by Roche-Dinkeloo Architects.
UN Plaza is crystalline glassy building with facets in plan and section but generally a clean-styled building. In 1983 the UN Plaza apartments’ tower was added. In 1999 it was renamed Millennium Hotel New York, UN Plaza.

Freedom Tower - Site of World Trade Center
The address: Ground Zero, Lower Manhattan. Being erected since 2004; projected by Daniel Libeskind Architects and David Childs of SOM Architects. The towers will replace the New York World Trade Centre skyscrapers lost in 2001. Freedom Tower skyscraper by Libeskind was to be a significant number of feet high - 1,776 ft - to mark a key American date in history - United States Year of Independence; the building was largely handed over to architect David Childs. It was designed to be the tallest tower in the world for the site leaseholder - real estate developer Larry Silverstein. Here echoes the Statue of Liberty.