The Zwebell’s soaring, two-story living room boasts a number of features unique to their apartment. The flying stair leads to the circular master bedroom contained in the turret; the gallery to its right once accommodated Nina Zwebell’s pipe organ. The half-arch below the staircase leads into the circular dining room. At foreground, the huge, spiral-columned fireplace with its flaring chimney breast extends nearly to the ceiling. The pair of French doors at left open onto a small veranda facing the court with its burbling fountain. Two bull’s-eye windows provide the room with dramatic clearstory light.