Bismarck was a subject of the King of Prussia, but Prussia was after all only one part of a larger unit; it was a part of Germany. At this time, however, Germany was little more than a geographical expression. The medieval emperors had never succeeded in establishing permanent authority over the whole nation; what unity there had been was completely broken down at the Reformation, and at the Revolution the Empire itself, the symbol of a union which no longer existed, had been swept away. At the restoration in 1815 the reorganisation of Germany was one of the chief tasks before the Congress of Vienna. It was a task in which the statesmen failed. All proposals to restore the Empire were rejected, chiefly because Francis, who had taken the style of Emperor of Austria, did not desire to resume his old title. Germany emerged from the Revolution divided into thirty-nine different States; Austria was one of the largest and most populous monarchies in Europe, but more than half the Austrian Empire consisted of Italian, Slavonic, and Hungarian provinces. The Emperor of Austria ruled over about 20,000,000 Germans. The next State in size and importance was Prussia. Then came four States, the Kingdoms of Saxony, Hanover, Bavaria, and Würtemberg, varying in size from five to two million inhabitants; below them were some thirty principalities of which the smallest contained only a few thousand inhabitants. By the principles adopted in the negotiations which preceded the Congress of Vienna, every one of these States was recognised as a complete independent monarchy, with its own laws and constitutions. The recognition of this independence made any common government impossible. Neither Austria nor Prussia would submit to any external authority, or to one another; the Kings of Bavaria and Würtemberg were equally jealous of their independence. All that could be done was to establish a permanent offensive and defensive alliance between these States. For the management of common concerns, a Diet was appointed to meet at Frankfort; the Diet, however, was only a union of diplomatists; they had to act in accordance with instructions from their governments and they had no direct authority over the Germans; each German was officially regarded as a subject, as the case might be, of the King of Prussia, the Prince of Reuss, the Grand Duke of Weimar. There was no German army, no German law, no German church. No development of common institutions was possible, for no change could be introduced without the universal consent of every member of the Confederation.