Marble House was built between 1888 and 1892 for Mr. and Mrs. William K. Vanderbilt. http://tickets.newportmansions.org/mansion.aspx?id=1004 has more information.
Marble house has a great view and a Chinese Tea House on the grounds. Alva Vanderbilt was a very interesting woman and held rallies for women's right to vote here.
Here is the huge ocean front yard:
The Tea House.
The views of the harbor:
The front of the mansion.
