See inside Marble House, Alva Vanderbilt Belmont's 140,000-square-foot Newport mansion that appears in 'The Gilded Age'

Marble House is in Newport, Rhode Island. Alexander Nesbitt — The Preservation Society of Newport County Marble House was completed in 1892 as a summer home for William K. Vanderbilt and Alva Belmont. Built with half a million cubic feet of marble, it contains 50 rooms and spans 140,000 square feet. Scenes from the HBO show "The Gilded Age" were filmed in the historic Rhode Island home. Alva Vanderbilt's 39th birthday present from her husband was a 140,000-square-foot summer "cottage" on th...