Oheka Castle, Otto Hermann Kahn’s vast country estate in West Hills on Long Island’s North Shore, became one of the grandest survivals of the Gold Coast era. Built between 1914 and 1919 in steel and concrete after fire nearly destroyed Kahn’s earlier house, it was among the first totally fireproof residences and was set on an engineered hill with formal Olmsted Brothers gardens and extensive recreational grounds. After Kahn’s death, the property passed through several owners and uses, including Eastern Military Academy, then fell into severe decline before a major restoration beginning in 1984. Today it functions as a luxury hotel and event venue and remains a prominent cultural landmark.