1350 - 1414 ISAAC DURAN (Profiat Duran) (Spain)
Scholar, astronomer, physician and philosopher. Though forcibly converted to Christianity, he reverted back to Judaism as soon as possible. After one of his friends was also converted and decided to remain Christian, he wrote two brilliant attacks on Christianity: Al Tehi ka-Avotekha (Be Not Like Your Fathers) and Kelimat ha-Goyim (The Confusion Of The Gentiles). The first was such a successful satire, that some Christian scholars actually thought it was pro-Christian and republished it until they realized the true meaning behind it. His Ma'aseh Efod (The Making of the Ephod) discussed both linguistics and the fundamental nature of Jewish music. He also wrote a historical work Zikaron haShemadot. ( A Record of Persecutions) .