About Renaissance Center
Renaissance Center (also known as the GM Renaissance Center and nicknamed the RenCen) is a group of seven interconnected skyscrapers in Downtown Detroit, Michigan, United States. Located on the International Riverfront, the Renaissance Center complex is owned by General Motors as its world headquarters. The central tower, called the Detroit Marriott at the Renaissance Center, is the tallest all-hotel skyscraper in the Western Hemisphere, and features the largest rooftop restaurant, Coach Insignia. It has been the tallest building in Michigan since 1977. John Portman was the principal architect for the original design. The first phase constructed a five-building rosette, with a 73-story hotel surrounded by four 39-story office towers, all surrounded by a square-shaped, 350,000 sq ft (33,000 m) all-retail podium including a shopping center with retail shops, cafes, restaurants, brokerage firms, banks, four movie theaters, private clubs, and even a department store. This first phase officially opened in March 1977. Portman's design renewed attention to city architecture, constructing the world's tallest hotel at the time. Two additional 21-story office towers opened in 1981.