Just after the stock market crashed in 1929, John D. Rockefeller Jr. started a very ambitious project to privately fund and build 14 neighboring, Art Deco buildings on 22 acres of Midtown Manhattan. The complex is called Rockefeller Center. This Sunken Plaza is the heart. The surrounding poles display the flags of the United Nations members. Beneath the famous gilded sculpture of the Greek Titan Prometheus is the Rock Center Café. This becomes The Rink for ice skaters during the winter.