The Over-the-Rhine Foundation and the Hudepohl-Schoenling Brewing Co. have teamed up for the 18th annual Bockfest, a celebration of German brewing heritage, Over-the-Rhine and the coming of spring. Friday-Sunday at various locations Downtown. Sunday features a traditional German mass at Old St. Mary's, special German cultural exhibitions and activities at Bockfest Hall and tours of Over-the-Rhine's historical churches.