Ramo

Rav Moshe Isserles Born in 1530, Rav Isserles served as the Rosh Yeshiva of Cracow. His most famous work is the Mapah, a commentary on the Shulchan Aruch, and he also authored the Darchei Moshe, a commentary on the Beit Yoseif of Rav Yoseif Karo. He is the main halachic authority for Ashkenazic Jewry. He passed away in 1572.