<Tr> <Th> Designated NHL </Th> <Td> October 12, 1994 </Td> </Tr> <Tr> <Th> Designated NHLDCP </Th> <Td> December 8, 1972 </Td> </Tr> <P> The Breakers is a Vanderbilt mansion located on Ochre Point Avenue, Newport, Rhode Island, United States . The building became a National Historic Landmark in 1994 and is a contributing property to the Bellevue Avenue Historic District . It is owned and operated by the Preservation Society of Newport County and is open for visitation on a year - round basis . </P> <P> The mansion was built as the Newport summer home of Cornelius Vanderbilt II, a member of the wealthy United States Vanderbilt family, in an architectural style based on the Italian Renaissance . It was designed by renowned architect Richard Morris Hunt with interior decoration by Jules Allard and Sons and Ogden Codman, Jr . The 70 - room mansion has a gross area of 125,339 square feet (11,644.4 m) and 62,482 square feet (5,804.8 m) of living area on five floors, constructed between 1893 and 1895 . The Ochre Point Avenue entrance is marked by sculpted iron gates, and the 30 - foot - high (9.1 m) walkway gates are part of a 12 - foot - high (3.7 m) limestone - and - iron fence that borders the property on all but the ocean side . The footprint of the house covers approximately 1 acre (4,000 m) of the 14 acres (5.7 ha) estate on the cliffs overlooking the Atlantic Ocean . </P>

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