The Mason House - Historic mansion on Commonwealth Avenue with signifcant 3 year renovation. A classic and grand interior is one of Boston's magnifcent Back Bay homes. 11+ bedrooms, 9 full baths, 5 half baths, Au pair suite, 14 fireplaces, & an elevator to all floors. Grand formal living rooms, intricate moldings, a magnificent marble Music Room, antique stained glass, dramatic Mahogany staircase. Eat-in Kitchen open to large family room. Private Garden, Roof Terrace, 4-5 Car Garag