General Motors HQ Renaissance Center, Michigan

General Motors' Headquarters is at the Renaissance Center in Detroit, which has 5,540,000 square feet of space, and a stop on the small downtown monorail. The center was originally conceived by Henry Ford II, and financed by Ford, along with other investors, in the 1970s, to help revitalize downtown Detroit. It was mostly designed by the architect John Portman. General Motors purchased the complex in 1996, and moved its headquarters there. General Motors, for many years the largest company in the nation, still has a dozen or so vehicle assemble plants in the USA, in Texas, Kentucky, Kansas, Tennessee, Missouri, Ohio, Indiana, and a few in Michigan. In addition the company has numerous parts plants, making engines, transmissions, and other components.