The German people remained politically divided throughout this period of the monarchies and experimental governments, and a considerable number of ducal and princely courts aped the splendours of Versailles on varying scales. The Thirty Years’ War (1618-48), a devastating scramble among the Germans, Swedes and Bohemians for fluctuating political advantages, sapped the energies of Germany for a century. A map must show the crazy patchwork in which this struggle ended, a map of Europe according to the peace of Westphalia (1648). One sees a tangle of principalities, dukedoms, free states and the like, some partly in and partly out of the Empire. Sweden’s arm, the reader will note, reached far into Germany; and except for a few islands of territory within the imperial boundaries France was still far from the Rhine. Amidst this patchwork the Kingdom of Prussia—it became a Kingdom in 1701—rose steadily to prominence and sustained a series of successful wars. Frederick the Great of Prussia (1740-86) had his Versailles at Potsdam, where his court spoke French, read French literature and rivalled the culture of the French King. In 1714 the Elector of Hanover became King of England, adding one more to the list of monarchies half in and half out of the empire. The Austrian branch of the descendants of Charles V retained the title of Emperor; the Spanish branch retained Spain. But now there was also an Emperor of the East again. After the fall of Constantinople (1453), the grand duke of Moscow, Ivan the Great (1462-1505), claimed to be heir to the Byzantine throne and adopted the Byzantine double-headed eagle upon his arms. His grandson, Ivan IV, Ivan the Terrible (1533-1584), assumed the imperial title of Cæsar (Tsar). But only in the latter half of the seventeenth century did Russia cease to seem remote and Asiatic to the European mind. The Tsar Peter the Great (1682-1725) brought Russia into the arena of Western affairs. He built a new capital for his empire, Petersburg upon the Neva, that played the part of a window between Russia and Europe, and he set up his Versailles at Peterhof eighteen miles away, employing a French architect who gave him a terrace, fountains, cascades, picture gallery, park and all the recognized appointments of Grand Monarchy. In Russia as in Prussia French became the language of the court.