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 Athens Treaty of Athens The Treaty of Athens between the Ottoman Empire and the Kingdom of Greece, signed on 14 November 1913, formally ended hostilities between them after the two Balkan Wars and ceded Macedonia—including the major city of Thessaloniki—, most of Epirus, and many Aegean islands to Greece. In the First Balkan War, the coalition of Bulgaria, Serbia, Greece and Montenegro defeated the Ottoman Empire. The Ottomans lost nearly all their European possessions, which were reduced to a small amount of territory around the Sea of Marmara by the Treaty of London. The Ottomans however were able to recover Eastern