The Treaty of The Hague (1625), also known as the Treaty of Den Haag, was signed on 9 December 1625 between England, the Dutch Republic and Denmark-Norway. Under the treaty, the English and Dutch provided Christian IV of Denmark-Norway with financial support for Danish intervention in the Thirty Years War. Intended as the basis of an international coalition against Emperor Ferdinand II, additional parties were invited to join, including France, Sweden, the Republic of Venice, Savoy and any other members of the Holy Roman Empire, although they failed to do so.

Sources