Hyatt Center is an office tower in Chicago completed in 2005. The 48 story skyscraper stands at 679 feet (207 m) on 71 South Wacker Drive. It is owned by the Irvine Company.Pei Cobb Freed & Partners' striking elliptical steel and glass design is reminiscent of Tour EDF, a skyscraper in Paris, France designed by the same firm.The 1,765,000 square foot (164,000 m²) building contains 65,000 cubic yards (50,000 m³) of concrete and 12,000 tons of structural steel.