Yahrtzeit of Rabbi Asher ben Yechiel (1250-1327), one of the greatest Talmudic commentators of all time. He is popularly known as the "Rosh," an acronym of his name. He lived at the time of the medieval Crusades, and in fear of being captured, fled from Germany to Spain. The classic "Shulchan Aruch" (Code of Jewish Law) gives great weight to the Rosh's opinions. He was the father of eight sons, one of whom wrote a groundbreaking work of Jewish law, "The Tur."