Real Presidio de San Saba. Originally established on the San Gabriel River as the Presidio of San Francisco Xavier in 1751 moved to the present site in 1757 as a protection to the Mission Santa Cruz de San Saba known as the Presidio de San Luis de Las Amarillas 1757-1761. After March 1761 the name was real Presidio de San Saba the stone building was completed in 1761. #4212