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A 1660 map of the city of New Amsterdam called the Castello Plan.

The Castello Plan is a map of New Amsterdam created by surveyor Jacques Cortelyou in 1660. It provides a detailed view of the layout and land use in New Amsterdam, including Fort Amsterdam, streets, homes and businesses, the canal, and the wall along the northern edge of the city that was built to keep the British out. The Castello Plan represents New Amsterdam around the peak of its settlement under the Dutch, with a population of several thousand. The name of the Castello Plan comes from the Villa di Castello, an estate near Florence, Italy, where the map was rediscovered in 1900.