Vytautas (c. 1350 – October 27, 1430) also known as Vytautas the Great (Lithuanian: About this sound Vytautas Didysis , Belarusian: Вітаўт Кейстутавіч (Vitaŭt Kiejstutavič), Polish: Witold Kiejstutowicz, Rusyn: Vitovt, Latin: Alexander Vitoldus); styled "the Great" from the 15th century onwards; was one of the most famous rulers of medieval Lithuania. Vytautas was the ruler (1392–1430) of the Grand Duchy of Lithuania which chiefly encompassed the Lithuanians and Ruthenians.