Mission San Rafael Arcángel was founded in 1817 as a medical asistencia ("sub-mission") of Mission San Francisco de Asís. It was a hospital to treat sick Native Americans, making it Alta California's first sanitarium. The weather was much better than in San Francisco, which helped the ill get better. It was not intended to be a stand-alone mission, but nevertheless grew and prospered and was granted full mission status on October 19, 1822.