מרן הרב יוסף קארו

Joseph ben Ephraim Karo, also spelled Yosef Caro, or Qaro, was a prominent Sephardic Jewish rabbi renowned as the author of the last great codification of Jewish law, the Beit Yosef, and its popular analogue, the Shulhan Arukh. Karo is regarded as the preeminent halakhic authority of his time, and is often referred to by the honorific titles HaMechaber and Maran.