1102 OBADIAH (Italy-Byzantine Empire-Persia-Egypt)
(Originally Johannes son of Dreux), a Norman Priest from Oppido Lucano Italy, decided to convert to Judaism. Believing that his life would not be safe if he stayed in Italy, he fled to Constantinople, then to Baghdad, and eventually to Fostat. He compiled a mahzor prayer book with musical notations similar to that used in Gregorian chant. He wrote his autobiography known as the Obadiah Scroll.