In Germany, where the rabbis had once been so proud of their traditional knowledge, the Black Death, with its attendant persecutions and banishments, had so thinned the ranks of the Jews that extraordinary intellectual decay had set in. The illiterate and the superficial, in the absence of better men, were inducted into rabbinical offices. This mischievous practice was vigorously opposed by Meïr ben Baruch Halevi, a rabbi, who, in his time, passed for a great authority in Germany (1370-1390). Rabbi at Vienna, as his father had been before him, Meïr Halevi (Segal) ordered that no Talmudical student should exercise rabbinical functions unless authorized by a rabbi of standing. Until then it had been the practice for anyone who felt able and willing to assume the rabbinical office without further ceremony, or, if he perchance settled in the neighborhood of his teacher, to obtain permission from him. As from the time of Gershom of Mayence there had always been great Talmudists in Germany, public opinion counteracted the abuse of this liberty; for had an unqualified person arrogated to himself the exercise of rabbinical functions, he would have incurred general derision and contempt. After the Black Death, however, this deterrent lost much of its force through the scarcity of Talmudists. The order of Meïr of Vienna, that every rabbi should be ordained, that he should earn the title (Morenu), and that, without such preparation, he should be precluded from dealing with matrimonial matters, marriages and divorces, was dictated by the exigencies of the times, not the presumptuousness of its author. The insignificance of even the most respected of the German rabbis of this period is apparent from the fact that not one of them has left any important Talmudical work; that, on the contrary, they all pursued a course productive of mental stagnation. Meïr Halevi, his colleague Abraham Klausner, and Shalom, of Austria, rabbi at Neustadt, near Vienna, devoted themselves exclusively to writing down and perpetuating the customs of the communities (Minhagim), to which, formerly, but very little attention had been given. They and their disciples, Isaac Tyrnau of Hungary, and Jacob Mölin (Maharil) have left behind them nothing but such insipid compilations. If the Austrian school, which at this time preponderated, was so wanting in intellectuality, how much more the Rhenish, from which only names have come down to us.