Margraviate of Brandenburg fief of the Polish–Lithuanian Commonwealth, to which the electors paid homage. The electors of Brandenburg spent the next two centuries attempting to gain lands to unite their separate territories (the Mark Brandenburg, the territories in the Rhineland and Westphalia, and Ducal Prussia) to form one geographically contiguous domain. In the Peace of Westphalia ending the Thirty Years' War in 1648, Brandenburg-Prussia acquired Farther Pomerania and made it the Province of Pomerania by the Treaty of Stettin (1653). In the second half of the 17th century, Frederick William, the "Great Elector", developed Brandenburg-Prussia into a major power. The state constructed Brandenburg's
Treaty of Madrid (1670) Treaty of Madrid (1670) The Treaty of Madrid (also known as the Godolphin Treaty) adopted in July 1670 was a treaty between England and Spain 'for the settlement of all disputes in America '.<ref name="SP 108/470"></ref> The treaty officially ended the war begun in 1654 in the Caribbean, in which England had conquered Jamaica. The treaty was highly favourable to England, as its ownership of territories in the Caribbean Sea was confirmed by Spain. The Anglo-Spanish war had begun in late 1654; in Europe the conflict ended with the Treaty of the Pyrenees (between France and Spain) and Charles II's