There are 5 missions built in the early 1700's in what is now San Antonio. The most famous is what we now call "The Alamo". Holly and I toured 4 of the 5 missions while in San Antonio in November.
Here's a photo I took of one of the missions... (Click for closeup look)
You can read more about the missions at http://www.lsjunction.com/facts/missions.htm