Rapid membership growth during the late 19th century prompted St. Mary's Church to complete plans for a new sanctuary in 1901. This Gothic-inspired native stone structure was designed by prominent San Antonio architect Leo M. Dielmann and built by contractor Jacob Wagner in 1906. It features an asymmetrical front facade with a dominent corner tower and spire containing three bells transferred from the nearby 1863 sanctuary. Commemorative stained glass windows were installed in 1906 and 1914-1917; altar windows portray Wagner's daughter and the son of an early parishioner.Recorded Texas Historic Landmark-1995