Was tha alamo a church

It was a mission

Yes

I belive it was part of a mission and the church was never finished. It didnt have a roof until the 1900s. That's why you are asked to maintain a somewhat quiet reverence and no pictures allowed inside. Actually a possible precideo as it had light defenses.

Headquarters

The Alamo was an unfinished Spanish mission

It was a unfinished mission being built

While being many things to many people of all walks of life the Alamo was initially a mission to help the local community. There is still a baptismal font and priest's quarters that are a part of the tour.

Part of it. The part that is still standing was a church.

Yes, it was originally an 18th century church

It was originally a mission.