Completed: September 1921 Opening: May 1924 (both towers) Antenna spire: 438 ft (134 m) Roof: 130 m (425 feet) Top floor: 21 (North Tower), 30 (South Tower) Architect(s): Graham, Anderson, Probst & White Developer: William Wrigley Jr.
Completed: September 1921 Opening: May 1924 (both towers) Antenna spire: 438 ft (134 m) Roof: 130 m (425 feet) Top floor: 21 (North Tower), 30 (South Tower) Architect(s): Graham, Anderson, Probst & White Developer: William Wrigley Jr.