Benjamin N. and Sarah Duke House (Historical), Entrance - 1009 Fifth Avenue, NYC - September 2010 . . . Built in 1901, this Beaux Arts townhouse was originally occupied by Benjamin N. Duke, the American Tobacco Company magnate. It continued to be occupied by relations of his until 2006. In July 2010, the house, considered the only private mansion remaining on Fifth Avenue, was sold for $44 million.