Casimir III was a Polish king traditionally depicted as a protector and benefactor of the Jews. Casimir continued his father's work of uniting the Polish realms. The stimulus given to the cultural and economic life of the country, and its progressive urbanization during his reign, attracted many Jews there, and he encouraged them to pursue economic activities. Casimir extended the rights granted to the Jews of Kalisz by the charter of Boleslav the Pious to include the Jews throughout Poland. He had previously ratified the charter on Oct. 9, 1334, and the reconfirmed text was delivered by him on July 15, 1364, to Falk of Kalisz on behalf of his compatriots who had settled in Polish towns. On April 25, 1367, he extended this privilege to Jews in Lesser Poland and Ukraine. Casimir was on friendly terms with his Jewish banker, Lewko of Cracow.