The statue of Atlas, facing 5th avenue, is the largest sculptural work at Rockefeller Center. Atlas carries the heavens upon his shoulders as punishment for defying Zeus. Designed and cast in 1936 by Lee Lawrie and Rene Chambellan, the statue´s exaggerated musculature and stylized body are characteristic of the Art Deco style.

Sources, related links:
Rockefeller Center - official web site
Wikipedia - Rockefeller Center
Wikipedia - Rockefeller Center Christmas Tree
Wikipedia - Rockefeller Rockefeller family