The Woolworth Building penthouse is back on the market for $79 million — a far cry from the $110 million it originally asked in 2014.
The five-story “castle on top of a castle” — as developer Ken Horn calls it — starts at 727 feet up. Horn’s Alchemy Properties is leaving the 9,680-square-foot behemoth as a blank raw slate.
However, it comes with proposed interior designs by Thierry Despont and David Hotson.
Details include 125 windows, 24-foot ceilings, a private elevator — and a 408-square-foot observatory terrace. The buyer will also have access to the building’s amenities, which include a gym, a lounge, a pool, a wine cellar and tasting room and a bike room.
The lower Manhattan terracotta and limestone building, designed by Cass Gilbert, was the world’s tallest building from 1913 to 1930.
Thirty-two condos start on the 29th floor, collectively known as the Woolworth Tower Residences, and are more than 75 percent sold, Horn recently told The Post.
The listing brokers are Stan Ponte and Joshua Judge, of Sotheby’s International Realty.