Built between 1921 and 1930,[2] the building rises 26 stories and includes two basement levels, occupying an entire block along Cadillac Square (adjacent to Campus Martius Park).

The structure has an unusual "Z" shape, designed so that most offices would have natural light and ventilation.

The building, designed by Albert Kahn in the Neoclassical architectural style, was constructed primarily with limestone.

The building also houses a parking garage in the South East tower, which is accessible from Bates Street.

The original cornice was removed in the late 1970s, and the parapet of the building covered with corrugated aluminum.