Nevertheless the Jews continued to reside in Kiev. In 1124 they suffered severely from a fire which destroyed a considerable portion of the city. In the chronicles of that period (1146-1151) mention is frequently made of the "Jewish gate" in Kiev. Jewish merchants were attracted towards this city, a growing commercial center serving as the connecting link between Western Europe on the one hand and the Black Sea provinces and the Asiatic continent on the other. Reference to Kiev is made by the Jewish travelers of the time, Benjamin of Tudela and Pethahiah of Ratisbon (1160-1190). The former speaks of "the kingdom of Russia, stretching from the gates of Prague to the gates of Kiev, a large city on the border of the kingdom." The latter, Pethahiah, informs us that, on leaving his home in Ratisbon, he proceeded to Prague, the capital of Bohemia; from Prague he went to Poland, and from there "to Kiev, which is in Russia," whereupon he traveled for six days, until he reached the Dnieper, and, having crossed it, finally arrived on the coast of the Black Sea and in the Crimea. After the Crusades, when considerable settlements of Jewish immigrants from Germany began to spring up in Poland, part of these immigrants found their way into the Principality of Kiev. The German rabbis of the twelfth century occasionally refer in their writings to the journeys of German Jews traveling with their merchandise to "Russ" and "Sclavonia" (= Slavonia, Slav countries). The Jews of Russia, who lacked rabbinical authorities of their own, addressed their inquiries to the Jewish scholars of Germany, or sent their studious young men to the West to obtain a Talmudic education. Hebrew sources of the twelfth century make mention of the names of Rabbi Isaac of Chernigov and Rabbi Moses of Kiev. The latter is quoted as having addressed an inquiry to the well-known Gaon of Bagdad, Samuel ben Ali.