To convert the Coahuiltecan Indians to the catholic faith...
There are 5 missions in San Antonio Texas, the Alamo, Mission Concepcion, Mission San Jose, Mission San Juan, and Mission Espada. Mission San Jose is largest of all the missions. All the Missions are still operating Catholic Churches. http://www.nps.gov/saan/index.htm The Double A baseball team of San Antonio are also call The Missions.
The Battle of the Alamo was fought at the Alamo Mission in what is now San Antonio, Texas, USA.
In San Antonio Texas
The address of the Alamo Mission Chapter Daughters Of The Republic Of Texas is: Po Box 91136, San Antonio, TX 78209-9096
A chapel for the mission San Antonio de Valero and it's located in San Antonio Texas.
It is 245 miles according to Google Maps.
Mission San Antonio de Valero was established.
The Alamo
It is the Alamo, which was a mission, that became a Texas shrine. A link can be found below.
I don't understand what you mean by "before Texas arrived", but the mission San Antonio de Valero was established in Spanish Texas by Spaniards in 1718. The mission was relocated from its original location twice with its final location being within the fort that was known as The Alamo due to the cottonwood trees in the area. The mission San Antonio De Valero later became known as The Alamo, the cradle of Texas liberty. However, to put things in perspective, the mission San Antonio De Valero is not the Alamo - the Alamo is the fort wherein the mission is located.
Died 6th March 1836 at the Alamo Mission, San Antonio, Texas
The first mission established in what was then known as Spanish Texas was San Francisco de la Espada. The location was near San Antonio de Bexar, or what is now San Antonio. The geographical coordinates are 29.317833 degrees N by 98.449968 degrees W.