Rishonim

Rishonim (Hebrew: ראשונים; sing. ראשון, Rishon) "the former ones," were the leading Rabbis and Poskim who lived approximately during the 11th to 15th centuries, in the era before the writing of the Shulkhan Arukh and following the Geonim. Rabbinic scholars subsequent to the Shulkhan Arukh are known as " Acharonim — the latter ones".
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