Before the great contest between the Lombards and Frederic Barbarossa, a genuine judicial trial was held, ending with the condemnation of the Milanese, who were declared rebels, _adstipulantibus judicibus et primis de Italia_. At Roncaglia, Frederic exercised judicial and legislative authority, with the assistance of four professors from Bologna, who maintained the Emperor's rights, not from any hostility to their own country, but because, as professors of Roman law, they were the natural champions of the Holy Roman Empire. Nor did the communes themselves raise any objection to these claims. After Frederic's defeat they continued to draw up their statutes, laws, and public instruments in his name. Even as late as the fifteenth century, we find that notaries still gave validity to public documents by making them run in the name of the Empire. At the peace of Constance the power to appoint magistrates, civil and criminal, consuls, Podestà, and notaries, was expressly reserved to the Emperor, whose prerogative in such matters, as well as of deciding causes of serious importance on final appeal, was fully recognised. If, in fact, the Milanese paid little regard to the Emperor's authority, his right was not questioned. The Lombards acknowledged themselves his lawful subjects, though they afterwards chose to act as if free and independent. When Henry VII. came to Italy, in Dante's time, he too, brought the Italian cities to trial, pronounced sentence on them, exacted fines on men and money, and cited King Robert of Naples to appear before him. At that time many must have deemed these proceedings farcical; but they were echoes of a bygone age, of a past which even Alighieri's immortal genius thought to recall to life, as his letters and his book, "De Monarchia," serve to show. The Church, it is true, constantly withstood the Empire, but during the whole of the Middle Ages the Emperor's political and juridical authority was never called in question, was invariably recognised.