Yosef Karo

Joseph ben Ephraim Karo, also spelled Yosef Caro, or Qaro (1488 – March 24, 1575), was author of the last great codification of Jewish law, the Shulchan Aruch, which is still authoritative for all Jews pertaining to their respective communities. To this end he is often referred to as HaMechaber and as Maran (Aramaic: "Our Master").