Billionaire Len Blavatnik has broken the city’s record for the most expensive townhouse after paying $90 million for an Upper East Side mansion, according to the New York Post. The seller, HNA Group, sold the home at 19 East 64th Street after recently picking it up in April for $79.5 million, a record at the time. Blavatnik, a music executive who already owns a home on 64th Street and paid $80 million for a home at 834 Fifth Avenue, has an estimated net worth of around $20.5 billion.

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6sqft reported in November that the 25,000-square-foot, 41-foot-wide townhouse at 19 East 64th Street belonging to art heir David Wildenstein had gone into contract for $81 million. The sale has closed for $79.5 million–$3,180 a foot–according to public records, setting a new record for Manhattan’s priciest townhouse sale; the previous record was held by the Harkness mansion at 4 East 75th Street, which sold for $53 million in 2006. According to The Real Deal, the buyer, listed as 19-21 East 64th Holding LLC, is affiliated with HNA Holdings Group CEO Roy Liao. HNA Holdings Group is also behind the $2.2 billion deal to purchase 245 Park Avenue. The 1930s townhouse is the former home of the Wildenstein gallery.

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When Carlos Slim, Mexican business magnate and former world’s richest person, listed his Upper East Side Beaux Arts mansion for $80 million in May 2015 he was looking to break the record for most expensive townhouse ever sold in NYC. An attempt was then made by this $84.5 million home on East 62nd Street, but now another neighborhood home is set to take the title. As the Post shares, 19 East 64th Street was listed for $100 million in August, and it’s now in contract by a Chinese conglomerate for a reported $81 million. If it closes, the price will far surpass the current record, the $53 million sale of the Harkness Mansion at 4 East 75th Street in 2006.

But there’s some drama behind the sale