$17.9 Million, 143 E. 63RD St.: This manse has played host to “the world’s most celebrated luminaries in show business, literature and politics.” No wonder, given that this combo of two townhouses was “designed for seamless entertaining on any scale” — measuring 25 feet wide and sporting 18 rooms, including six bedrooms and seven-plus bathrooms, plus a garden. A pair of pagodas create a harmonious outdoor living/dining room, and crowning it all is a fifth-floor gym and “meditation terrace.” Agents: Tom Postilio and Mickey Conlon, Core, 212-726-0783 and 212-612-9623