The Cadillac Tower is a 40-story, 133.4 m (438 ft) Neo-Gothic skyscraper designed by the architectural firm of Bonnah & Chaffee 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 Barlum Tower. At the top of the tower is a tall guyed mast for local radio stations WMXD, WLLZ and television station WLPC-CD. It was listed on the National Register of Historic Places in 2005.