What was the title that XXX held?
Ulugh Beg
Mīrzā Muhammad Tāraghay bin Shāhrukh (Chagatai: میرزا محمد طارق بن شاہ رخ, Persian: میرزا محمد تراغای بن شاہ رخ‎‎) better known as Ulugh Beg (الغ‌ بیگ) (March 22, 1394 in Sultaniyeh, Persia -- October 27, 1449, Samarkand) was a Timurid ruler as well as an astronomer, mathematician and sultan.
sultan