Harbor Hill was an enormous Renaissance style country house on Long Island, designed in 1899 by Stanford White and built from 1900 to 1902 for Clarence H. Mackay and his wife Katherine. Clarence Mackay, heir to the Comstock lode silver fortune, became a major figure in the development of the international telegraph business. The 648-acre estate stood atop the highest point in the area overlooking the village of Roslyn and Hempstead Harbor, with formal gardens and terraces around the main house and a 70-acre farm. At the bottom of the west garden, Mackay commissioned two replicas of the famous Marly Horse statues, originally built in 1739 for King Louis XV of France; the 26-foot statues and pedestals were carved by sculptor Franz Plumelet and installed in 1920. After Clarence Mackay's death in 1938, Harbor Hill passed to his son John Mackay. The mansion was demolished in 1947 because of vandalism during World War II, and after the property was sold in the late 1950s it largely became the Country Estates housing development. In the 1950s, the north Mackay Horse Statue was moved to Roslyn High School. The south Mackay Horse Statue remained on its original pedestal above the house at 165 Poplar Drive, East Hills, until 2010, after Bruce and Melissa Shulman donated the statue and pedestal to the Town of North Hempstead in 2009. Dismantled on January 27, 2010 for restoration and relocation to Gerry Park, the restored statue and pedestal were unveiled there on October 19, 2013 with support from the Gerry Charitable Trust and private contributions generated by the Roslyn Landmark Society, and the statue's plaza and landscaping were completed in August 2018 with funding from Nassau County and the Town of North Hempstead.