Fort St. Louis was founded by theFrench explorer René Robert Cavelier Sieur de La Salle in 1685. The Frenchhad come to the middle Texas coast quite by accident. The colonists had intended to settle at the mouth of the Mississippi but miscalculated and landed nearly 400 miles to the west at Matagorda Bay.
I have a history book that I never use anymore xD. Hope This Helps