Old Chicago Main Post Office

The Old Chicago Main Post Office is a nine-story-tall office building in downtown Chicago, Illinois, U.S. The building was designed by Graham, Anderson, Probst & White and built in 1921. The structure of the building was expanded greatly in 1932 to serve Chicago's great volume of postal business, increased significantly by the mail-order businesses of Montgomery Ward (the largest retailer in the United States) and of Sears (its competitor). The building is listed on the National Register of Historic Places. In 1997, the post office moved to a modern processing center nearby and the building was sold by the U.S. Postal Service for redevelopment in 2009. After an extensive restoration project, the Old Post Office became home to many corporate offices including Ferrara Candy Company, PepsiCo, Cisco Systems, Uber, CBOE, Home Chef, Vizient, Inc., and more.