Orange Line to Back Bay Exit onto Dartmouth Street. Turn left and walk untill you pass Tremont Street. Dartmouth turns into West Dedham at Tremont. Go one block to Shawmut Avenue. Take a right on Shawmut and go just past the first light. St. Stephen's is on your right - across from Blackstone Park.
Green line to Copley Walk down Dartmouth and follow the directions above.
Silver Line From Downtown Crossing or Dudley Station get off at the East Newton Street stop. Walk across the park to Shawmut and up one block to 419.