High Quality Content by WIKIPEDIA articles! Cadillac Tower is a Beaux Arts skyscraper designed by the architectural firm of Bonnah Chaffee located at 65 Cadillac Square in downtown Detroit, Michigan, not far from the Renaissance Center. The building`s materials include terra cotta and brick. It was built in 1927 as the Barlum Tower and has 40 floors, including two below ground. At the top of the tower is a tall guyed mast for local radio station WJLB. It was listed on the National Register of Historic Places in 2005.