Tur Rabbi Jacob ben Asher

Tur - Rabbi Jacob ben Asher (1269-1343), Spain; Composer of Arba’ah Turim, tracing Halacha from the Torah through the Talmud and early Poskim, citing the author’s opinions as well as dissenting opinions. Many commentaries were written on the Tur, most prominent among them Rabbi Yosef Karo’s “Beit Yosef,” which formed the basis of the Shulchan Arukh.