St. Marks Church Postcards St. Marks Church No. 1303 Postcard. Caption on front: St. Marks Church, Dorchester, Mass. 105375. Postally unused. On verso: C.T. American Art. Facebook Twitter Print Friendly Skills Catholic, Dorchester, St. Marks Church Posted on November 30, 2022 ← Saranac Street St. Brendans Church, Dorchester, Mass. →