Fort Amsterdam (subsequently named Fort James, Fort Willem Hendrick, Fort James (again), Fort William Henry, Fort Anne and Fort George) was a fort on the southern tip of Manhattan that was the administrative headquarters for the Dutch and then English/British rule of New York from 1625 or 1626 until being torn down in 1790 after the American Revolution. It was designed by Cryn Fredericks, chief engineer of the New Netherland colony.