Step inside the Gilded Age mansion that just sold for $34.5 million after years in bankruptcy

The drawing room of the House of Cassini mansion in New York City.

Evan Joseph for Sotheby's International Realty

• Bidding has closed on a 1901 mansion where Oleg Cassini designed fashions for Jacqueline Onassis.
• On Wednesday, a bankruptcy judge approved a $34.5 million top bid for the Gilded Age townhouse.
• Look inside the Beaux-Arts beauty and read about its contentious, sometimes violent history.

A 20-room Gilded Age mansion, once the atelier of fashion designer Oleg Cassini...