Westphalia to be Catholic. Osnabrück was divided almost equally between Catholicism and Protestantism. Parts of Westphalia came under Brandenburg-Prussian control during the 17th and 18th centuries, but most of it remained divided by duchies and other areas of feudal power. The Peace of Westphalia of 1648, signed in Münster and Osnabrück, ended the Thirty Years' War. The concept of nation-state sovereignty resulting from the treaty became known as "Westphalian sovereignty". After the defeat of the Prussian Army by the French at the Battle of Jena–Auerstedt, the Treaty of Tilsit in 1807 made the easternmost portion of today's Westphalia part of the
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