Texas History By wagonkai000 Nov 4, 1492 Columbus Began European Exploration to the Americas. Nov 4, 1519 Pineda Conquered the Aztec empire. Nov 4, 1521 Cabeza de Vaca Mapped the Texas coastline. Nov 4, 1528 Coronado Searched for the seven cities of gold, but found nothing. Nov 4, 1539 Estevanicio First blackman in America, died while helping search for 7 cities of gold. Nov 4, 1540 Cortes Traveled Texas for 7 years and wrote a book about his travels. Nov 4, 1542 Moscoso Claimed the Rio Grande Valley for Spain. Nov 4, 1598 Onate Found petroleum in East Texas. Nov 4, 1685 La Salle Built Fort St. Louis on Matagorda Bay.