Mission San Francisco de Asís, also known as Mission Dolores, is the oldest surviving structure in San Francisco, California. Founded in 1776 by Franciscan missionaries, it was the sixth mission established in the California Mission System. The mission aimed to convert local Native Americans to Christianity and promote agriculture. The mission features a simple adobe church and a cemetery, showcasing early Spanish colonial architecture. It played a significant role in the development of the area and is now a historic site, attracting visitors interested in California's history and the mission era.