Robert Henderson Robertson was an American architect who designed numerous houses, institutional and commercial buildings, and churches. He is known for his wide-variety of works and commissions, ranging from private residences such as Jacqueline Kennedy's childhood home Hammersmith Farm and the Adirondacks Great Camp Santanoni to some of the earliest steel skyscrapers in New York City.

Vanderbilt Mansion National Historic Site is a historic house museum in Hyde Park, New York, United States. It became a National Historic Landmark in 1940. It is owned and operated by the National Park Service.