Mīrzā Muhammad Tarāghāy bin Shāhrukh, better known as Ulugh Beg, was a Timurid sultan, as well as an astronomer and mathematician. March 30, 1394 – November 5, 1449; died at 55. Alive at the same time as Johannes Gutenberg, Zheng He, Jan Hus, François Villon, and Jan van Eyck. Wiki link