The Treaty of Dover, also known as the Secret Treaty of Dover, was an agreement between Louis XIV of France and Charles II of England signed at Dover on 1 June 1670. Officially, it only committed England to provide France with general diplomatic assistance. However, of greater significance were secret provisions which remained largely unknown until published by historians over a century later.
Under these, Charles would provide military backing for a French invasion of the Dutch Republic, and committed to convert to Catholicism at some future date. In return, Louis agreed to pay him a secret pension of £230,000 per year, as well as a bonus when his conversion was made public. Charles hoped these payments would help make him financially independent of Parliament.