21. Sotheby's 67 1/2 Chestnut St, Boston, MA 02108 Coordinate: 42.3576,-71.068436 Phone: (617) 367-6323
22. Gibson Sotheby's International Realty 597a Tremont St, Boston, MA 02118 Coordinate: 42.34319,-71.07329 Phone: (617) 426-6901