Old St. Mary's Church is a historic Roman Catholic church located in San Francisco, California. Built in 1854, it is one of the oldest churches in the city and features a beautiful Gothic Revival architectural style. The church has a rich history, having survived the 1906 earthquake and subsequent fires, making it a significant landmark in the area. The church is known for its stunning stained glass windows and intricate woodwork. It serves as a place of worship and community gatherings, reflecting the cultural heritage of the Irish immigrants who helped establish it. Today, Old St. Mary's Church continues to be an active parish, welcoming visitors and worshippers alike.