10 Gracie Square 6A, a duplex on Manhattan's Upper Eastside, is asking $15 million. The unit features 5 bedrooms and 6 bathrooms along with 11 foot ceilings, private elevator, 3 wood-burning fireplaces, a wood-paneled library, chef's kitchen and formal dining room. The unit encompasses two floors, with the bedrooms upstairs and living areas downstairs. All 5 bedrooms are ensuite complete with bathrooms and walk-in closets. The listing comes complete with a 9' X 12' storage unit. 10 Gracie Square is one of the Manhattan's most prestigious co-ops and was developed in 1929 by John Drummond Kennedy and designed by architectural firms Van Wart & Wein and Pleasants Pennington & Albert W. Lewis. Amenities include a squash court, storage rooms and a private gated driveway. 10 Gracie Square 6A is currently listed with Douglas Elliman.