near Tucson, Arizona
San Xavier del Bac, Arizona, is a beautifully preserved gem of the late Baroque style of New Spain. Completed in 1797, it stands in the San Xavier District of Tohono O'odham Nation, about twelve miles south of Tucson, Arizona. Alone of the Sonoran Desert missions, San Xavier is still served by Franciscans, and still serves the Native community for which it was built.
The magnificent Baroque interior, basically unchanged since 1797.
Part of which site