Its seat was Bologna, one of the chief centres of the civic and commercial life of Lombardy. The Lombards themselves had shown a persistent legal genius: their own Teutonic codes, enacted in Italy, had maintained themselves in that land of Roman law and custom. Lombard codification had almost reached a jurisprudence of its own, at Pavia, the juridical centre of Lombardy. The provisions of various codes had been compared and put together in a sort of _Concordia_, as early as the ninth century.[389] Possibly the rivalry of Lombard law might stimulate those learned in the law of Rome to sharper efforts to expound it and prove its superiority. Moreover, all sides of civic life and culture were flourishing in that region where novel commercial relations were calling for a corresponding progress in the law, and especially for a better knowledge of the Roman law which alone afforded provision for their regulation. As some long course of human development approaches its climax, the advance apparently becomes so rapid as to give the impression of something suddenly happening, a sudden leap upward of the human spirit. The velocity of the movement seems to quicken as the summit is neared. One easily finds examples, for instance the fifth century before Christ in Greek art, or the fourth century in Greek philosophy, or again the excellence so quickly reached apparently by the Middle High German poetry just about the year 1200. But may not the seeming suddenness of the phenomenon be due to lack of information as to antecedents? and the flare of the final achievement even darken what went before? Yet, in fact, as a movement nears its climax, it may become more rapid. For, as the promoting energies and favouring conditions meet in conjunction, their joint action becomes more effective. Forces free themselves from cumbrances and draw aid from one another. Thus when the gradual growth of intellectual faculty effects a conjunction with circumstances which offer a fair field, and the prizes of life as a reward, a rapid increase of power may evince itself in novel and timely productivity.