Ulugh Beg (1394-1449), grandson of Timur Beg, was a sultan as well as an astronomer, and a mathematician. He closes a long succession of Islamic geographers and astronomers. Ulugh Beg was also notable for his work in astronomy-related mathematics, such as trigonometry and spherical geometry. The first Latin edition, with parallel original text, of his Catalogue of Stars was prepared by the celebrated Oxford orientalist Thomas Hyde (1636-1703). Hyde, an extraordinarily talented polyglot, was Professor of Arabic and Hebrew in the University of Oxford and government interpreter of Oriental languages.