The Landmark Penthouse, a 3 BR 4.5 Bath duplex in the legendary Steinway Hall portion of 111 West 57th Street, lists for $21 million. Steinway Hall was a recording studio where Charlie Parker, Miles Davis, Ella Fitzgerald and Duke Ellington created music. SHoP Architects and Studio Sofield have reimagined the 5,269 sqft space featuring a great room with 26 ft vaulted ceilings, intricately patterned solid oak floors, and arched glass doors opening to a 1,000 sqft wrap around terrace. The upper level master suite includes a 2,500 sqft private terrace with tree top views of Central Park. Building amenities include: a Porte-cochere entrance on 58th street; a lobby accented with limestone, marble and steel; a 82 ft swimming pool; a double height fitness center; and 24-hour attended entrances and dedicated concierge service. [NY Post]