what is mission san diego de alcala known for
San Diego Historic Landmark. Mission Basilica San Diego de AlcalÃ¡ was the first Franciscan mission in The Californias, a province of New Spain. Located in present-day San Diego, California, it was founded on July 16, 1769 by Spanish friar JunÃ­pero Serra in an area long inhabited by the Kumeyaay.