Charles Steen y J.R. Gettens iniciaron un proyecto para limpiar los yesos interiores usando cepillitos y acetatos polivinilicos

Founded by Father Kino, originally a Jesuit mission, taken over by Franciscans who rebuilt it around 1800. The mission was involved in mining, smelting, ranching, and farming activities. The national historic park has a replanted orchard and visitor center.