Listed by Claire Groome and Lawrence Treglia of Sotheby's International Realty

Perched atop the storied Sohmer Piano Building—architect Robert Maynicke's crowning achievement on Fifth Avenue—this completely renovated penthouse commands an irreplaceable position adjacent to the Flatiron Building. Two grand foyers connect via a circular baronial limestone staircase, while more than 40 oversized windows and an 80-foot greenhouse-style expanse flood the open-concept interior with extraordinary natural light. The privately deeded roof deck and golden dome cupola deliver panoramic, 360-degree views encompassing the Empire State Building, Madison Square Park, and the Manhattan skyline. A corner primary suite with three exposures, a Waterworks soaking tub, and 35-plus linear feet of closet space completes a residence that is, above all else, a piece of living New York history. In a remarkable philanthropic gesture, all proceeds from the sale will benefit the Gorongosa Project in Mozambique, adding a meaningful legacy to this extraordinary offering. Property and opportunity details provided by seller or others; buyer to verify.