Jan 01, 1855St. Mary’s, Savannah St. Mary’s, Savannah Leave a Comment / By Staff / January 1, 1855 St. Mary’s, Savannah. Founded 1855. Diocesan Timeline Related 'St. Mary’s, Savannah' Topics Timeline Tagged Founding of a church | St. Mary's - Savannah Click or tap on a topic or tag to see similar posts.