Authority maintained so long against the successor of Peter would be far from indulgent to rebellious subjects. For it was in this light that the Lombard cities appeared to a monarch bent on reviving all the rights his predecessors had enjoyed: nay, all that the law of ancient Rome gave her absolute ruler. It would be wrong to speak of a re-discovery of the civil law. That system had never perished from Gaul and Italy, had been the groundwork of some codes, and the whole substance, modified only by the changes in society, of many others. The Church excepted, no agent did so much to keep alive the memory of Roman institutions. The twelfth century now beheld the study cultivated with a surprising increase of knowledge and ardour, expended chiefly upon the Pandects. First in Italy and the schools of the South, then in Paris and Oxford, they were expounded, commented on, extolled as the perfection of human wisdom, the sole, true, and eternal law. Vast as has been the labour and thought expended from that time to this in the elucidation of the civil law, the most competent authorities declare that in acuteness, in subtlety, in all those branches of learning which can subsist without help from historical criticism, these so-called Glossatores have been seldom equalled and never surpassed by their successors. The teachers of the canon law, who had not as yet become the rivals of the civilian, and were accustomed to recur to his books where their own were silent, spread through Europe the fame and influence of the Roman jurisprudence; while its own professors were led both by their feeling and their interest to give to all its maxims the greatest weight and the fullest application. Men just emerging from barbarism, with minds unaccustomed to create and blindly submissive to authority, viewed written texts with an awe to us incomprehensible. All that the most servile jurists of Rome had ever ascribed to their despotic princes was directly transferred to the Cæsarean majesty who inherited their name. He was 'Lord of the world,' absolute master of the lives and property of all his subjects, that is, of all men; the sole fountain of legislation, the embodiment of right and justice. These doctrines, which the great Bolognese jurists, Bulgarus, Martinus, Hugolinus, and others who constantly surrounded Frederick, taught and applied, as matter of course, to a Teutonic, a feudal king, were by the rest of the world not denied, were accepted in fervent faith by his German and Italian partisans. 'To the Emperor belongs the protection of the whole world,' says bishop Otto of Freysing. 'The Emperor is a living law upon earth[185].' To Frederick, at Roncaglia, the archbishop of Milan speaks for the assembled magnates of Lombardy: 'Do and ordain whatsoever thou wilt, thy will is law; as it is written, "Quicquid principi placuit legis habet vigorem, cum populus ei et in eum omne suum imperium et potestatem concesserit[186]." The Hohenstaufen