Kingdom of Lithuania

The Kingdom of Lithuania was a sovereign state that existed from 17 July 1251 until the death of the first crowned king of Lithuania, Mindaugas, on 12 September 1263. Mindaugas was the only Lithuanian monarch crowned king with the assent of the Pope and the head of the first Catholic Lithuanian state. The formation of the kingdom is widely regarded as a partially successful attempt at unifying all surrounding Baltic tribes, including the Old Prussians, into a single unified state under a common king. Other monarchs of Lithuania were referred to as grand dukes, kings or emperors in extant foreign written sources as the size of the realm and their power expanded or contracted. This practice can be compared to.