With the campaign of Grand Duke
Gediminas of Lithuania and his subjection of
Kiev and
Volhynia (1320–1321) the Jewish inhabitants of these territories were induced to spread throughout the northern provinces of the
Grand Duchy of Lithuania. The probable importance of the southern Jews in the development of Belarus and Lithuania is indicated by their numerical prominence in Volhynia in the 13th century. According to an annalist who describes the funeral of the grand duke
Vladimir Vasilkovich in the city of
Vladimir (Volhynia), "the Jews wept at his funeral as at the fall of
Jerusalem, or when being led into the
Babylonian captivity." This sympathy and the record thereof would seem to indicate that long before the event in question, the Jews had enjoyed considerable prosperity and influence, and this gave them a certain standing under the new
régime. They took an active part in the development of the new cities under the tolerant rule of Grand Duke Gediminas. Little is known of the fortunes of the Belarusian Jews during the troublous times that followed the death of Gediminas and the accession of his grandson, Grand Duke
Vytautas the Great (1341). To the latter, the Jews owed a charter of privileges which was momentous in the subsequent history of the Jews of Belarus and Lithuania. The documents granting privileges first to the Jews of
Brest (July 1, 1388) and later to those of
Hrodna,
Trakai (1389),
Lutsk, Vladimir, and other large towns are the earliest documents to recognize the Jews of the Grand Duchy of Lithuania as possessing a distinct organization. The gathering together of the scattered Jewish settlers in sufficient numbers and with enough power to form such an organization and to obtain privileges from their Lithuanian rulers implies the lapse of considerable time. The Jews who dwelt in smaller towns and villages were not in need of such privileges at this time, and the mode of life, as
Abraham Harkavy suggests, "the comparative poverty, and the ignorance of Jewish learning among the Lithuanian Jews retarded their intercommunal organization." But powerful forces hastened this organization toward the close of the 14th century. The chief of these was probably the cooperation of the Jews of
Poland with their brethren in the GDL. After the death of
Casimir III (1370), the condition of the Polish Jews changed for the worse. The influence of the Roman Catholic clergy at the Polish court grew;
Louis of Anjou was indifferent to the welfare of his subjects, and his eagerness to convert the Jews to Christianity, together with the increased Jewish immigration from Germany, caused the Polish Jews to become apprehensive for their future. ==Jagiellon rule==