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 Turin (1696) The war was formally ended by the 1697 Treaty of Ryswick which incorporated the Treaty of Turin. By splitting the Allies, Savoy's defection enabled Louis to obtain better terms at Ryswick than he might otherwise have done, for a relatively minor cost. France relinquished Pinerolo but Savoy's territories in Transalpine France were almost impossible to defend and were occupied by France again from 1704 to 1714. Victor Amadeus achieved his primary goals of recovering Pinerolo and Casale, while his daughter's marriage enhanced Savoy's position on the European stage. The cost was a devastated and impoverished country and "...a reputation for...cynical