Born in 1583 (his exact date of birth is unknown), Natan Spira, an outstanding Kabbalist, preacher, expert in Talmudic and philosophical literature, chairman of the rabbinical court in Krakow, died on 20th July 1633. Interestingly, Spira was the son-in-law of a member of the Kraków kehilla, Mojżesz Jakubowicz, who provided him with support and resources to let him continue his studies. Natan Spira was considered a saint by his contemporaries. He preached that the dispersion of the Jewish nation (diaspora) and the transmigration of souls (gilgul neshamot), through successive incarnations, were the punishment for the contamination of Israel with sin. He dedicated all his fortune to charity and science.Acording to Henry Halkowski, starting from 1617, Spira was the rector of the Krakow yeshiva, where he taught Torah,…