The first offering of a spectacular one-of-a-kind high floor duplex in an elegant Upper East Side prewar boutique coop. This four bedroom plus a library duplex has wonderful prewar charm and grand space. Enter a semi-private elevator vestibule into an entry foyer, lined in rich wood paneling with a charming powder room and under-staircase closet. The enormous living room has two huge sunny South-facing windows and a wood-burning fireplace. The adjacent dining room is extremely large and also faces South. There's a charming library with a fireplace just off the dining room. The kitchen is spacious with a washer/dryer, butler's pantry and adjacent breakfast room. A staff room and bath complete the rooms on this floor. The second level has a generously sized primary bedroom with a fireplace, dressing room with closets, and large bath with a double vanity. There are three additional bedrooms, one with a private bath and two with a Jack and Jill shared bath. There are lovely wood floors throughout, high ceilings, and much historic detail in beautifully proportioned rooms. There's some through-wall AC and some windows units. Built in 1927, 170 East 79th Street is an elegant, fifteen story, twenty-six-unit, boutique cooperative designed by the renowned architect J.E.R. Carpenter. This building features a pretty landscaped garden for residents, a doorman (8am-midnight), a live-in super, laundry room, and bike room. The building allows 50% financing, pied-a-terres, and it's pet friendly. There is a flip tax of 1.5% of the sale price. The convenient mid-block location on beautiful tree-lined 79th Street is in close proximity to Central Park, The Museum Mile District, many fine restaurants and gourmet food establishments, as well as transportation, shops and services.