Aaron Ben Jacob of Karlin (1736–1772); one of the first Hasidic leaders in Lithuania, founder of the Hasidic dynasty (still present in Israel). In the early 60s of the 18th century, he established the first Hasidic prayer group in Karlin, as a model for other groups emerging in Lithuania at that time. In Hasidism, he represented the ascetic stream, spoke out against excessive taxation of the poor, in defense of which he did not hesitate to use his personal authority and institution of curse. He composed his own hymn for Sabbath, which is featured in many Hasidic prayer books.

The content of this entry has been prepared on the basis of the source materials of the Polish Scientific Publishers PWN.