At 432,300 square feet (40,160 m2), BMO Plaza is ninth-largest office building downtown.

[7] Tenants include BMO Harris Bank, U.S. Department of Defense, and General Electric Capital Services.

[8] During the late nineteenth century, the building site had been the home of the Denison Hotel.

[9] The building was developed as First Indiana Plaza by Indianapolis-based Phillip R. Duke and Associates and construction was started in mid 1986 following the demolition of the seven-story Denison Parking garage on the site.

[3] In September 2008, the building was renamed M&I Plaza following the acquisition of First Indiana by Marshall & Ilsley Corporation earlier that year.