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 .
Fort Amsterdam ( later called Fort James , Fort Willem Hendrick , Fort James ( again ) , Fort William , Fort Anne and Fort George between British and Dutch rule ) was a fort on the southern tip of modern-day Manhattan that was the administrative headquarters for the Dutch and then British rule of New York from 1625 to 1790 , when it was torn down after the American Revolution .