The Wildenstein family—the art dealing dynasty that is currently embroiled in a tax evasion case in France—has relisted its Upper East Side townhouse after a deal with the Qatari government fell through. Designed by Horace Trumbauer, the Gilded Age treasure spans over 21,000 square feet and carries a $100 million price tag. This is the first time that the limestone-clad structure has been on the market since 1932.