Rabbi Yosef Rosen, known as the Rogatchover Gaon (Prodigy/Genius), passed away in Vienna on Thursday, March 5, 1936.
Rabbi Rosen, born in 1858, and raised in the Belarusian city of Rogatchov, served for decades as a rabbi in the Latvian city of Dvinsk (Daugavpils). He was an unparalleled genius, whose in depth understanding of all Talmudic literature left the greatest of scholars awestruck. He habitually demonstrated that many of the famous debates between the Talmudic sages have a singular thread and theme.
Rabbi Rosen authored tens of thousands of responsa on the Talmud and Jewish law. Many of them have been compiled in the set of volumes Tzafnat Paneach.