BMO Plaza, formerly the M&I Plaza, is a high-rise office building located at 135 North Pennsylvania Street in Indianapolis, Indiana. It was completed in 1988 and is currently the sixth-tallest building in the city, at 401 ft (122 m) with 28 stories. It is primarily used for office space. At 432,300 square feet (40,160 m2), BMO Plaza is the ninth-largest office building downtown, according to IBJ statistics. Tenants include BMO Harris Bank, U.S. Department of Defense, and General Electric Capital Services.