Back Bay duplex near Public Garden includes 12-foot ceilings, three fireplaces

The brownstone at 68 Commonwealth Avenue dates from 1890 and is not even two blocks from the Public Garden.

On its first floor is the initial level of Unit 1, a duplex with 10 rooms, three fireplaces, and 2,817 square feet. That spread is on sale through Gibson Sotheby’s George Ballantyne for $3.6 million.

There are also 12-foot ceilings, built-in shelves, pocket doors, and the potential for three bedrooms.

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