From the end of the eighteenth century until the Revolution of 1917, the Jewish communities of Vilna (Vilnius), Odessa, and Warsaw stood out as the prominent intellectual and cultural centers of Russian and Polish Jewry. In the period immediately following the Partitions of Poland, the preeminence of the northern region and Vilna, its major city, was acknowledged by all. Characterized by the rich Talmudical tradition associated with Elijah ben Solomon (1720-1797), the famous Gaon [Sage] of Vilna, and his disciples, Vilna signified then, and to a great extent continues today to signify, the values of intensive traditional learning combined with deep religious piety. In fact, in the literature on Russian Jewry, Vilna is often referred to as the Jerusalem of the North, indicating its special character and place in the history of East European Jewry. However, while Vilna symbolized the traditional world, over the course of the nineteenth century, the Jewish community of Russia was moving in a different direction. The political, economic, social and especially demographic forces of the modern period significantly altered the basic character of the Jewish community of the Russian Empire.