Question: detroit was founded by an explorer with what last name
Answer: Antoine Laumet de la Mothe , sieur de Cadillac ( / ˈkædɪlæk / , French : ( kadijak ) ; March 5 , 1658 -- October 16 , 1730 ) , usually referred to as Antoine de la Mothe Cadillac ( also spelled Motte ) , was a French explorer and adventurer in New France which stretched from Eastern Canada to Louisiana on the Gulf of Mexico .