isted for $29.5 million by Cris Condon at Sotheby's International Palm Beach, Louwana is the landmark estate designed in 1919 by Addison Mizner for Marie Louise Wanamaker Munn and Gurnee Munn. As you may recall in 2008, the Spence School bought the Wanamaker-Munn House at 17 East 90th St. from the estate of Aimee de Heere