When my boyfriend and I went to Newport, Rhode Island in June one of the five mansions we visited was the Marble House. This mansion was very impressive, featuring 500,000 cubic feet of marble according to the Newport Historical Society website. While we were touring, it was disclosed that some of the marble in one of the hallways by the stairwell was faux marble, because the real marble that was needed was burned in a warehouse fire. It was built by William K. Vanderbilt, the grandson of Cornelius Vanderbilt, and his wife between 1888 and 1892.
I picked up the postcard below from an antique store in Newport, and the guy who owned the store was actually one of the co-authors of Newport Mansions: Postcards of the Gilded Age. The card refers to the Marble House as the Marble Palace. It was mailed in 1910 with no message. Fun fact: this was one of the filming locations for the Robert Redford version of The Great Gatsby.