Iris Cantor — philanthropist and widow of Cantor Fitzgerald founder Bernie Cantor — just closed on a townhouse at 11 East 74th Street, between Madison and Fifth avenues, according to the Post. Cantor bought the 10,800-square-foot home for $18.13 million. The seven-bedroom, 10-bath townhouse was first listed for $35 million in 2007. Cantor is also trying to sell two of her other properties. Her 35,000-square-foot mansion in Bel Air, Calif., which has its own hair salon, is on the market for $53 million, and a penthouse at 110 Central Park South, which Cantor has never lived in, is being marketed for $11.9 million.