said to have perished in the Rhenish cities alone between May and July 1096. Alleged crimes, like desecration of the host, ritual murder, poisoning of wells, and treason, brought hundreds to the stake and drove thousands into exile. Jews were alleged to have caused the inroads of the Mongols, though they suffered equally with the Christians. Jews suffered intense persecution during the Rintfleisch massacres of 1298. In 1336 Jews from Alsace were subjected to massacres by the outlaws of Arnold von Uissigheim. When the Black Death swept over Europe in 1348–49, some Christian communities accused Jews of poisoning wells. Compared to the south and west of the Holy Roman Empire, the persecutions appear to have brought less drastic effects in the eastern parts of the Holy Roman Empire. Nonetheless, in the Erfurt Massacre of 1349, the members of the entire Jewish community were murdered or expelled from the city, due to superstitions about the Black Death. Many persecutions were clearly favoured by a royal throne crisis and the Wittelsbach-Luxembourg dualism, therefore recent German research proposed the term “Thronkrisenverfolgungen” (throne crisis persecutions). Royal policy and public ambivalence towards Jews helped the persecuted Jews fleeing the German-speaking lands to form the foundations of what would become the largest Jewish community in Europe in what is now Poland/Ukraine/Romania/Belarus/Lithuania. In the Holy Roman Empire The legal and civic status of the Jews underwent a transformation under the Holy Roman Empire. Jewish people found a certain degree of protection with the Holy Roman Emperor, who claimed the right of possession and protection of all the Jews of the empire. A justification for this claim was that the Holy Roman Emperor was the successor of the emperor Titus, who was said to have acquired the Jews as his private property. The German emperors apparently claimed this right of possession more for the sake of taxing the Jews than of protecting them. A variety of such taxes existed. Louis IV, Holy Roman Emperor, was a prolific creator of new taxes. In 1342, he instituted the "golden sacrificial penny" and decreed that every year all the Jews should pay the emperor one kreutzer out of every florins of their property in addition to the taxes they were already paying to both the state and municipal authorities. The emperors of the House of Luxembourg devised other means of taxation. They turned their prerogatives in regard to the Jews to