The Alamo Mission in San Antonio is commonly called The Alamo and was originally known as Misión San Antonio de Valero. It was founded in the 18th century as a Roman Catholic mission and fortress compound, and today is part of the San Antonio Missions World Heritage Site in San Antonio, Texas, United States. It was the site of the Battle of the Alamo in 1836, and is now a museum in the Alamo Plaza Historic District.