Fort Amsterdam
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.
Fort Amsterdam Media
Manhattan in 1660, based on the Castello Plan, with the fort on the left
Map of Manhattan in 1664 with the fort on the right (north is to the left)
John Van Arsdale securing the American flag
The Government House, built on the site of Fort George in 1790