Incredible opportunity to live in a grand Park Avenue duplex in the heart of the Upper East Side. Originally two Classic 8 apartments, this home has been thoughtfully combined and offers the possibility of 5-6 bedrooms, 4.5 bathrooms, 2 working gas-fired fireplaces, a large formal dining room, living room, library and a second kitchen/makerspace. A private elevator landing leads to what feels like a townhouse in the sky. The upper floor (8th floor) boasts a windowed eat-in kitchen and great entertaining spaces. Also on this floor is the oversized Master suite with a separate seating area/office and a huge en suite bathroom with double sinks, a built-in vanity, Jacuzzi/soaking tub, shower stall and a walk-in closet. A beautiful spiral staircase leads to the private quarters on the lower level (7th floor). This floor features additional bedrooms, 3 bathrooms (including another Jacuzzi) and lots of space that lends itself to easy everyday living. Other details include well-maintained hardwood floors, abundance of natural light from all 4 exposures, a washer/dryer, 9.5 ft ceilings and tons of storage. Built in 1917 by renowned architects, Rouse & Goldstone, this full-service co-op boasts a grand lobby, 24 hour doorman, private storage, a terrific gym and a recreation area with (billiards, ping pong, air hockey & foosball). This central location on East 75th Street is close to Central Park, the subway, crosstown bus and many of the city's best schools.