DOVER, TREATY OF. A secret treaty concluded on May 22, 167o between Charles II. of England and Louis XIV. of France, whereby Charles II. agreed to embrace the Roman Catho lic faith and the king of France to assist him in this with a large sum of money and the use of 6,000 troops. It was agreed that the two countries should declare war jointly on the United Prov inces, and also that England should support the claim of Louis, should he "acquire new titles and rights to the Spanish Monarchy." The treaty was negotiated through Henrietta, Duchess of Orleans and sister of Charles II.
The treaty did not however become operative as such owing to the religious controvery involved; in a later version (Dec. 167o) the proposed conversion of the English king was omitted, and a date fixed for the declaration of war against the United Provinces.
(See CHARLES II.)