מהר"י ברונאMahari Bruna
The responsa that Mahari Bruna wrote to many communities in Europe, it would become one of the main sources for Rabbi Moshe Isserles gloss on the Shulchan Arukh.The responsa that Mahari Bruna wrote to many communities in Europe, it would become one of the main sources for Rabbi Moshe Isserles gloss on the Shulchan Arukh.