In 1624, the Dutch occupied what they then called "Nieuw Amsterdam", after Holland's biggest city. In 1664, the city fell into the hands of the British when Peter Stuyvesant signed it over and it was renamed New York, after the Duke of York. But in 1673 the Dutch, with their fleet of ships, regained control of New York harbor and their leader renamed the colony New Orange. This was officially its name for a year until it was "permanently ceded" to the British under the Treaty of Westminster.