A rare offering on Madison Avenue, this grand Upper East Side co-op presents a unique opportunity to own a sprawling, full-floor space currently configured as a prestigious art gallery. The layout is both expansive and flexible, allowing for conversion to a private residence, live-work loft, family office, or continued use as a cultural institution. Designed in 1917 by Rouse & Goldstone, the building is a distinguished example of prewar architecture. This second-floor residence enjoys multiple exposures and soaring proportions throughout. Situated just one block from Central Park and surrounded by world-class boutiques, galleries, and museums, the location offers immediate access to the finest of Manhattan's cultural and commercial offerings. This is a rare opportunity to acquire a legacy property in one of the most desirable locations on the Upper East Side.