Sepher Yuchasin [“Book of Genealogies”: onomasticon and history]. With printed glosses by Moses Isserles (RaM”A). * Appended: Seder Olam Zuta [historical record from the year 166-452]

The astronomer Abraham Zacuto (1452-c.1515) served at the court of Salamanca and following the expulsion of the Jews from Spain in 1492, became chief astronomer in the service of King John II of Portugal. Zacuto’s astrolabe, tables and maritime charts were instrumental in Portuguese explorer Vasco da Gama’s 1496 voyage to India. Upon the expulsion of the Jews from Portugal in 1497, Zacuto took up residence in Tunis, where he worked on his history, Sepher Yuchasin. Zacuto often differs with the findings of his predecessors, R. Sherira Gaon, Abraham ibn Daud Halevi (author Sepher HaKabbalah) and Maimonides. Though Sepher Yuchasin takes the reader from Adam to the author’s day, scholars have noted that the author's main contribution are his original - and at times controversial interpretations of events during the Second Temple and Talmudic eras. See EJ, Vol. XVI, cols. 903-06.