A sun-filled, unique 1 Bedroom, 1 Bath south-facing Penthouse with an exceptional terrace atop a Prewar Cooperative built in 1918, located on a quiet, tree-lined block in the heart of the Upper East Side. The windowed entry foyer leads to the bright, south-facing Living Room with floor-to-ceiling sliding doors opening onto the beautifully planted terrace with open, unobstructed city views. This extraordinary and charming space features a large bay window facing west, a custom built-in bookcase with small bench and a wood-burning Franklin Fireplace. The Bedroom features a wall of closets and another sliding door onto the large terrace. A Kitchen and a full Bath with a skylight complete this wonderful home. Additional features include, wide-board pine floors, 9'2" ceilings and through the wall A/C. The paved terrace with a high parapet allows for gracious entertaining and privacy with beautiful plantings overlooking open Manhattan views. A rare find in Manhattan and an excellent home for elegant living and entertaining near all of the best restaurants, shopping, museums and conveniences that Manhattan offers. 139 East 66th Street is a discreet 10-story, 22 residence Cooperative with a Doorman, 8am to 1am. Laundry in Basement and Pied-a-terre permitted. 50% financing allowed.