He was a pupil of Asher ben Yehiel, at whose request (in 1310) he wrote the astronomical work Yesod Olam, the best contribution on that subject to Hebrew literature.
Joseph Stalin | Isaac Newton | Isaac Asimov | Joseph Conrad | Saint Joseph | Joseph Haydn | Joseph Beuys | Joseph | Joseph Goebbels | Isaac Stern | 1948 Arab–Israeli War | Joseph II, Holy Roman Emperor | David Ben-Gurion | Ben Affleck | Joseph Barbera | Israeli Air Force | Israeli | Ben Jonson | Joseph Chamberlain | Joseph Brodsky | Franz Joseph I of Austria | Joseph Henry Blackburne | Joseph Banks | Isaac Hayes | Joseph McCarthy | Ben Harper | Joseph II | Joseph Campbell | Joseph and the Amazing Technicolor Dreamcoat | Big Ben |