The Cadillac Place Building , originally named the General Motors Building, was designed and constructed by famed Detroit architect Albert Kahn. The historic building has a neo-classical and art deco design and was constructed with steel, limestone, granite and marble -- some of the most expensive construction materials even today. Construction of the building spanned from 1919 to 1922, and once completed it boasted 1.3 million square feet of commercial real estate and stood 220 feet tall. In 1985, the building was officially deemed a National Historic Landmark and it served as the General Motors World Headquarters from its opening in 1923 until 2000. In 2001, the building's name was changed to Cadillac Place, named after Detroit's founder, Antoine Laumet de la Mothe, sieur de Cadillac.