Vertical half page advertisement for the Cadillac Automobile Company, Detroit, Michigan. Cadillac was founded in 1902 by Henry Leland, a master mechanic and entrepreneur, who named the company after his ancestor, Antoine Laumet de La Mothe, sieur de Cadillac, the founder of the city of Detroit. The company's crest is based on a coat of arms that Antoine de la Mothe Cadillac had created at the time of his marriage in Quebec in 1687. General Motors purchased the company in 1909. Cadillac is one of the oldest vehicle manufacturers still in existence and is still owned by General Motors. Cadillac is now considered a luxury brand, however, and is no longer "the car of economy."