1653 Imperial election electoral rights in a treaty of 1619, confirmed at the Diet of Regensburg on February 25, 1623. The revolt ignited a broader religious war across Germany, the Thirty Years' War, which would involve not only the states of the empire but also Sweden, the Dutch Republic, France, Denmark–Norway, England, Scotland, Spain and Hungary and which would kill some eight million people before its end. The Peace of Westphalia which ended the war in 1648 revived the principle of "cuius regio, eius religio" established in 1555 by the Peace of Augsburg and established the modern concept of Westphalian sovereignty. It additionally
Christendom are usually taken to have ended with the Treaty of Westphalia (1648), or arguably, including the Nine Years' War and the War of the Spanish Succession in this period, with the Treaty of Utrecht of 1713. In the 18th century, the focus shifts away from religious conflicts, either between Christian factions or against the external threat of Islamic factions. The European Miracle, the Age of Enlightenment and the formation of the great colonial empires together with the beginning decline of the Ottoman Empire mark the end of the geopolitical "history of Christendom". Instead, the focus of Western history shifts to