R. Israel Marpurk and R. Israel of Noyshtat. On many occasions he signed himself as 'The small one and the young one in Israel' (Ha-katan ve-ha-tzair she-be-Israel). His pupils were coming from Austria, Bohemia, Moravia, Hungary, Silesia, Bavaria, and the Rhineland, among them Israel Bruna, Moses Mintz, and Joseph b. Moses. He is considered as an ideal type of medieval rabbi, who demanded from the community and its members a strict observance of ritual laws, social justice and fairness in business and commerce. He was prone to mysticism, studied kabbalistic works and accepted some kabbalistic customs as his own, even though he was also acquainted with the contemporary Christian scientific literature. He often served as an arbitrator between different communities and his decision was considered final. With the appearance of the press and the codification of halachah his responsa were included in numerous collections, the most prominent being the Shulchan Aruch. His works include: Trumat ha-Deshen, 354 responses, edited by himself, and Psakim u-Chtavim, 267 responses, edited by his pupils after his death (both printed in Venice already in 1519), Beurim, commentaries on Rashi's Commentary on Torah, 36 Shearim (36 Gates), laws on Kashrut, and Seder Gitin, a handbook for divorces. His oldest son Petachia or R. Kachil studied at his father's yeshivah, where he served as his secretary. In his father's name he even answered a question of R. Abraham from Poland. He married in Maribor. On 3 June 1489 he was still involved in lending money. On 12 November 1489 and on 8 March 1493 he is mentioned in Graz, with Nassan (Natan), son of Khatschl of Maribor or R. Kachil or Petachia, son of R. Israel Isserlein. His wife, Schoendlein, was also learned and wrote a full Teshuva in Yiddish on Hilchot Niddah in the name of her husband. Works Terumat HaDeshen Terumat HaDeshen is a work in two parts. The first part of is a collection of 354 responsa by R' Isserlein. The work is named for the practice in the Temple in Jerusalem of removing a part of the previous day's ashes from the furnace – 354 is the numerical value of Deshen (Hebrew: דשן). Terumat HaDeshen serves as an important source of the practices of the Ashkenazi Jews. The work was therefore used by R' Moses Isserles as one basis for HaMapah – the component of the Shulkhan Arukh which specifies divergences between Sephardi