Who is Antonie de Cadillac?

He's a french explorer:

Antonie Laumet de La Mothe de Cadillac (March 5, 1658 - Oct. 15, 1730) was a French explorer, soldier, and leader. Cadillac founded the city of Detroit in 1701 and was the governor of the Louisiana Territory from 1710 to 1716 or 1717.