Oheka Castle, also known as the Otto Kahn Estate, is located on the North Shore of Long Island, in Huntington, New York. It was the country home of investment financier and philanthropist Otto Hermann Kahn and his family. The name Oheka is an acronym of its original owner's name Otto Hermann Kahn, which Kahn also used to name his yacht Oheka II and his ocean-front Villa Oheka in Palm Beach, Florida. The mansion was built by Kahn between 1914 and 1919, and is the second largest private home in the United States, comprising 127 rooms and over 109,000 square feet (10,100 m2), as originally configured.