This lavish townhouse could easily pass for a Parisian or Italian home, but it’s, in fact, hiding behind a traditional brownstone facade on the Upper East Side. Located at 234 East 61st Street, the four-story residence is part of the ultra-exclusive Treadwell Farm Historic District, which encompasses only two blocks. Though it was built along with its neighbors in 1873, the house underwent a unique interior renovation in 1910 that added its 21-foot vaulted ceilings and rear, arched addition that opens to the magical south-facing garden. Other stylistically unique architectural elements that have made their way in include the wrought iron railings, ornately carved marble fireplace, and etched glass windows. After last selling in 2006 for $7.9 million, it’s now asking $13.9 million.