Treaty of Lisbon

The Treaty of Lisbon of 1668 was a peace treaty between Portugal and Spain that was concluded at Lisbon on 13 February 1668 with the mediation of England in which Spain recognised the sovereignty of Portugal's new ruling dynasty, the House of Braganza. The regent of Spain, Queen Mariana of Austria, the second wife of the late King Philip IV, acted in the name of her young son, Carlos II and oversaw the negotiations on the behalf of Spain. The prince-regent of Portugal, Pedro, the future King Peter II of Portugal, in the name of his incapacitated brother, Afonso VI, represented Portugal. The peace was mediated by Edward Montagu, 1st Earl of Sandwich, an ambassador of Charles II of England.