Gediminas (c.1275 – December 1341), was  Grand Duke of Lithuania from 1315 or 1316 until his death. He is credited with founding this political entity and expanding its territory which, at the time of his death, spanned the area ranging from the Baltic Sea to the Black Sea. Also seen as one of the most significant individuals in early Lithuanian history, he was responsible for both building Vilnius, the capital of Lithuania, and establishing a dynasty that can be traced to other European monarchies such as Poland, Hungary and Bohemia.