Nochum Partzovitz  Rabbi Nochum Partzovitz (he: נחום פרצוביץ) (died November 26, 1986) was a rabbi and Rosh Yeshiva of Yeshivas Mir and is known worldwide for erudite explanations of Talmudic topics. Partzovitz was born in Trakai, Poland to its Chief Rabbi, Rabbi Aryeh Tzvi Partzovitz. Rabbi Aryeh Tzvi was a grandson of the posek of Vilna, Rabbi Shlomo HaKohen and son-in-law to Rabbi Nochum Greenhouse. As a young boy, Partzovitz was reputed to have been so eager to engage in Torah study that he would run to cheder in the morning barefoot because putting on shoes took up too much time. Rabbi Partzovitz learned from an early age in the Yeshiva in Baranovitch under the leadership of Rabbi Elchonon Wasserman and Rabbi Dovid Rappaport. However, when he reached the age of thirteen, the yeshiva's administration decided that his level of Talmudic study was too advanced for their school, so he was sent to learn under Rabbi Boruch Ber Leibowitz. At the age of fifteen, Rabbi Aryeh Tzvi, an alumnus of Yeshivas Mir, convinced his son to relocate to the Mirrer Yeshiva, where he was warmly welcomed by its Rosh Yeshiva, Rabbi Eliezer Yehuda Finkel. Soon after joining the yeshiva, the Mir Yeshiva was exiled to Shanghai to escape the horrors of the Holocaust which annihilated much of European Jewry during World War II. In Shanghai, Reb Nachum continued to learn with tremendous diligence, earning the respect and admiration of the Yeshiva's Mashgiach, Rabbi Yechezkel Levenstein, and acting Rosh Yeshiva, Rabbi Chaim Leib Shmuelevitz. During this time, Reb Nochum—known as Reb Nochom Troker—is reputed to have studied daily for twelve hours straight with his colleague Rabbi Shmuel Berenbaum. He also studied in China with Rabbi Abba Berman. After briefly immigrating to Toronto, Ontario, Canada, following World War II, Partzovitz moved to Israel and joined the newly established Mir Yeshiva of Jerusalem.