Rav Yosef Rosen Rogatchover Gaon

Rabbi Yosef Rosen, known as the Rogatchover Gaon [11 Adar, 5696], was an unparalleled genius, whose in-depth understanding of all Talmudic literature left the greatest of scholars awestruck. He authored tens of thousands of responsa on the Talmud and Jewish law, of which many have been compiled in the numerous volumes of Tzafnat Paneach. He served for decades as the chief rabbi of the chasidic congregations of the Latvian city of Dvinsk (Daugavpils).