In the same age in which the Jewish refugees from Spain and Portugal were wending their steps towards the Turkish East, bands of Jewish emigrants, fleeing from the stuffy ghettos of Germany and Austria, could be seen wandering towards the Slavonian East, towards Poland and Lithuania, where, during the period of the Reformation, a large autonomous Diaspora center sprang into life. The transmigration of Jewish centers, which is so prominent a feature of the sixteenth century, found its expression in two parallel movements: the demolished or impoverished centers of Western Europe were transplanted to the countries of Eastern Europe on the one hand, and to the lands of contiguous Western Asia on the other. Yet the destinies of the two Eastern centers--Turkey and Poland--were not identical. The Sephardim of Turkey were approaching the end of their brilliant historic career, and were gradually lapsing into Asiatic stupor, while the Ashkenazim of Poland, with a supply of fresh strength and the promise of an original culture, were starting out on their broad historic development. The mission of the Sephardim was a memory of the past; that of the Ashkenazim was a hope for the future. After medieval Babylonia and Spain, no country presented so intense a concentration of Jewish energy and so vast a field for the development of a Jewish autonomous life as Poland in the sixteenth and the following centuries.[42] The uninterrupted colonization of Slavonian lands by Jewish emigrants from Germany, which had been going on during the Middle Ages, prepared the soil for the historic process which converted Poland from a colony into a center of Judaism. The large Jewish population settled in the towns and villages of Poland and Lithuania formed, not a downtrodden caste, nor a homogeneous economic class, as in Germany, but an important social entity, unfolding its energy in many departments of social-economic life. It was not tied down to two exclusive occupations, money-lending and petty trade, but it participated in all branches of industrial endeavor, in production and manufacture, not excluding rural avocations, such as land tenure and farming. The men of wealth among the Jews farmed the tolls (transit and customs duties) and the excise (state taxes collected on wine[43] and other articles of consumption), and frequently attained to prominence as the financial agents of the kings. When, at a later date, the Jews were hampered in the business of tax-farming, their capital found a new outlet in the lease of crown and Shlakhta estates, with the right of "propination,"[44] or liquor traffic, attached to it, as well as in working the salt mines, in timbering forests, and opening up the other resources of the soil. The big merchants were busy exporting agrarian products from Poland into Austria, Moldavo-Wallachia, and Turkey. The lower classes engaged in retail trade, handicrafts, farming, vegetable-growing, gardening, and,