Conrad Black’s estate on the Bridle Path will be auctioned to the highest bidder on March 8, 2016. The home has been in Black’s family for 65 years. It is 23,000-square-foot and sits on a 6.6-acre lot. The home has nine-bedrooms and 11-bathrooms. The mansion has a caretaker suite and a converted coach house guest apartment. It is valued at $21.8 million. Black’s house was built in six stages and has undergone extensive renovations by New York architect Thierry Despont, who has also designed and built homes for Calvin Klein, Bill Gates and the late Greek shipping tycoon Stavros Niarchos. “It is a big house for two people,” Black said in a statement. “We will be abroad a good deal and moving to a more manageable home will be a convenience to us now as our careers have evolved.” Concierge Auctions will handle the sale.