Cadillac Place, formerly the General Motors Building, is a landmark high-rise office complex located at 3044 West Grand Boulevard (between Casa and Second Streets), in the New Center area alongside the Detroit River, of downtown Detroit, Michigan, in the Great Lakes region of the Midwestern United States.

[4][5] After much pressure by the General Motors Corporation Board of Directors, William C. Durant (1861-1947), agreed in 1919 to construct a permanent headquarters in Detroit for the company he formed a decade earlier in 1908.

The corporation then purchased the block between Cass and Second Streets, facing on West Grand Boulevard and removed the earlier 48 smaller longtime structures from the site to begin work.

Albert Kahn (1869-1942l, was hired as architect to design the huge massive multi-winged structure, then one of the largest office buildings in the United States.

Groundbreaking was held June 2, 1919, and the Cass Avenue wing was ready for occupancy in November 1920 while the remainder of the building was under construction.

Cadillac Place currently houses over 2,000 State employees including the Michigan Court of Appeals for District I.

Designed by architect Albert Kahn, the structure consists of a two-story base with four parallel 15-story wings connecting to a central perpendicular backbone.

Kahn used this design to allow sunlight and natural ventilation to reach each of the building's hundreds of individual offices.

To the south of the main building is the five-story Annex which served as the original home of General Motors Research Laboratory.

In 2009 when the Argonaut Building was sold, a fourth-floor pedestrian bridge connecting the two was removed and the Annex facade was restored.

In addition to upgrading existing systems, reconfiguring some spaces and redecorating, the project installed central air conditioning.