European Union law fair dealing through their business. In 1517, the Protestant Reformation triggered a hundred years of crisis and instability. Martin Luther nailed a list of demands to the church door of Wittenberg, King Henry VIII declared a unilateral split from Rome with the Act of Supremacy 1534, and conflicts flared across the Holy Roman Empire until the Peace of Augsburg 1555 guaranteed each principality the right to its chosen religion ("cuius regio, eius religio"). This unstable settlement unravelled in the Thirty Years' War (1618–1648), killing around a quarter of the population in central Europe. The Treaty of Westphalia 1648, which brought
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