Back in May, 6sqft learned that Mexican business magnate Carlos Slim had put his Upper East Side mansion at 1009 Fifth Avenue on the market for a record $80 million. While coverage at the time was mainly focused on the insane asking price and the location, at the end of the day, what we all really wanted to know was what exactly was inside this 20,000-square-foot behemoth that warranted a high eight-figure price tag. Now, lo and behold, Curbed has just spotted the updated listing for the limestone and red-brick stunner, and as one would anticipate, it boasts all the ornate details and grandiose spaces you’d expect from such a historic home—although far less flash that what you’d dream up for one of the world’s richest men.

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Carlos Slim, Mexican business magnate and former world’s richest person, is looking to break the record for most expensive townhouse ever sold in NYC. As the Daily News first reported, he’s listed his Upper East Side Beaux Arts mansion at 1009 Fifth Avenue for $80 million, after buying it for only $44 million five years ago from Russian oil mogul Tamir Sapir.

Built in 1901, the limestone-and-red-brick home is known as the Duke-Semans Mansion and is one of the last remaining private homes on Fifth Avenue. It’s located directly across from the Met, rises eight stories, and encompasses a whopping 20,000 square feet. According to the listing, the French Renaissance interiors “feature soaring ceilings, hand-carved wood paneling, lovely trompe l’oeil accents, gold-leaf trimmed fixtures and intricate plaster friezes.”

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