Ulugh-Beg, a Tartar prince, grandson of Tamerlane; astronomy was a favourite study of his, and in the patronage of it he founded an observatory at Samarcand; after a reign of 40 years conjointly with his father and by himself, he was put to death by a son who had rebelled against him (1394‒1449).
Definition taken from The Nuttall Encyclopædia, edited by the Reverend James Wood (1907)
Ultramontanism * Ulysses