The Treaty of The Hague is signed by Portugal and the Dutch Republic.

The Treaty of The Hague (also known as the Treaty of Den Haag) was signed on 6 August 1661 between representatives of the Dutch Empire and the Portuguese Empire. Based on the terms of the treaty, the Dutch Republic recognized Portuguese imperial sovereignty over New Holland (Dutch Brazil) in exchange for an indemnity of 4 million reis, conversion from 2 million Caroli Guilders, over the span of 16 years.