John Duncan’s mansion, New York’s early architectural legend, is up for sale. The exceptional 5.5 story limestone mansion was originally built in 1902, and is situated in Manhattan’s premier townhouse block. Well preserved and meticulously restored, the mansion features luxurious interiors with grand rooms, extraordinary ceiling heights, a sweeping staircase and elaborate detail. No mansion is complete without an elevator, this one has a four passenger elevator serving all floors! In addition to six bedrooms, seven full-baths and four half-bathrooms the mansion also includes a double-height library, wine cellar, and servant quarters. Listed at Sotheby’s for $31,000,000.