Important Dates from Exploration and Colonization By gaby._.je 1519 Pineda maps Gulf of Mexico 1537 Cabeza de Vaca reports on explorations in Texas 1682 Establish first mission at Courpus Christi de la Ysleta 1685 LaSalle settle Fort St. Louis 1687 Father Hidalgo caused the Spanish to be suspicious of French colonization 1690 Established the mission San Francisco de los Texas in East Texas. 1st. Mission in East Texas 1718 San Antonio founded 1719 East Texas missions are moved to San Antonio 1720 Mission San Jose is completed in San Antonio and other missions are built