St. Marks Church Postcards, Religious Institutions St. Marks Church No. 387 Postcard. Caption on front: St. Marks Church, Dorchester, Mass. Postally unused. Facebook Twitter Print Friendly Skills Dorchester, Dorchester Avenue, Roman Catholic, St. Marks Church Posted on November 22, 2022 ← John Francis Fitzgerald, Honey Fitz, Mayor of Boston, 1863-1950 Baker Memorial, Uphams Corner →