The former Frank Sinatra’s apartment at New York’s Upper East Side is currently on sale and we have the chance to have a sneak peek into it! The 3,200 square foot penthouse has been designed with the help of Sinatra himself and he lived there till 1972. The apartment features 4 bedrooms, 6 bathrooms, 2 big terraces and amazing views over East river. Andy Warhol as frequent guest has characterize the place as a ‘’glittering grotto in the sky’’. What makes this place unique? The glass ceiling to top walls, the glass staircase designed in Apple store a Warhol painting in the living room and the famous visitors of the past such as Marilyn Monroe and J.F Kennedy.