Famous as the burial site of the heroes of the Alamo, the Roman Catholic San Fernando Cathedral (Church of Nuestra Señora de la Candelaria y Guadalupe) is one of the oldest cathedrals in the US and is listed on the National Register of Historic Places. The walls of the original church, completed in 1750 and built by settlers from the Canary Islands (hence the painting of the Virgin of Candelaria), now form the cathedral's sanctuary. The building also played an important role in the siege of the Alamo, for it was here that the Mexican forces let it be known that "no quarter" would be given.