Designed by Frank Sinatra in 1961, the singer's former residence is a 3,200-square-foot penthouse overlooking the East River in New York City. With four bedrooms, six bathrooms and two terraces that wrap around the outside of the apartment, it's no surprise Andy Warhol once dubbed it a "glittering grotto in the sky." Ol' Blue Eyes left the apartment in 1972 and while the space has largely stayed the same, renovations in 2008 made way for a contemporary glass staircase, marble fireplace and gourmet kitchen. The Manhattan penthouse is currently back on the market and is valued at $6 million USD.
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