Pieroni's Restaurant and Hotel. One of the famous Pieroni's -- Located at 7 Park Square, close to the Public Gardens and next to the B. & W. Bus Terminal in the shopping and theatre district. Pieroni's invites you to stay and dine when in Boston. Famous for its Seafoods and Steaks. Other Pieroni's at 601 Washington St. & 13 Stuart St. Established in 1875.