The 120-story twin towers were planned to reach a height of 2,000 feet (610 m), the same as the cancelled Chicago Spire that began construction in 2007.

[1] On July 21, 2011, Davies announced his plans for the Twin Towers within the Old Chicago Main Post Office Redevelopment.

[6] The building was also intended to support revenue-generating communications antennas[2] and to host commercial, hotel and residential facilities.

For example, the heights of the residential accommodations in the planned building would have placed residents within the radiation impact zone from the antennas atop the Sears Tower.

[8] In December 2014, Davies canceled the project and put the post office building up for sale.