page_title: History of Lithuania
section_title: Algirdas and Kęstutis
hierarchical_section_title: History of Lithuania / Grand Duchy of Lithuania (13th century–1569) / 13th–14th century Lithuanian state / Algirdas and Kęstutis
caption_attribution_description: Беларуская (тарашкевіца)‎: Уяўны партрэт вялікага князя Альгерда (Algierd)
context_page_description: The history of Lithuania dates back to settlements founded many thousands of years ago, but the first written record of the name for the country dates back to 1009 AD. Lithuanians, one of the Baltic peoples, later conquered neighboring lands and established the Grand Duchy of Lithuania in the 13th century. The Grand Duchy was a successful and lasting warrior state. It remained fiercely independent and was one of the last areas of Europe to adopt Christianity. A formidable power, it became the largest state in Europe in the 15th century through the conquest of large groups of East Slavs who resided in Ruthenia. In 1385, the Grand Duchy formed a dynastic union with Poland through the Union of Krewo. Later, the Union of Lublin created the Polish–Lithuanian Commonwealth that lasted until 1795, when the last of the Partitions of Poland erased both Lithuania and Poland from the political map. Afterward, the Lithuanians lived under the rule of the Russian Empire until the 20th century.
  On February 16, 1918, Lithuania was re-established as a democratic state.
context_section_description: Around 1318, Gediminas' elder son Algirdas married Maria of Vitebsk, the daughter of Prince Yaroslav of Vitebsk, and settled in Vitebsk to rule the principality. Of Gediminas' seven sons, four remained pagan and three converted to Orthodox Christianity. Upon his death, Gediminas divided his domains among the seven sons, but Lithuania's precarious military situation, especially on the Teutonic frontier, forced the brothers to keep the country together. From 1345, Algirdas took over as the Grand Duke of Lithuania. In practice, he ruled over Lithuanian Ruthenia only, whereas Lithuania proper was the domain of his equally able brother Kęstutis. Algirdas fought the Golden Horde Tatars and the Principality of Moscow; Kęstutis took upon himself the demanding struggle with the Teutonic Order.
  The warfare with the Teutonic Order continued from 1345, and in 1348, the Knights defeated the Lithuanians at the Battle of Strėva. Kęstutis requested King Casimir of Poland to mediate with the pope in hopes of converting Lithuania to Christianity, but the result was negative, and Poland took from Lithuania in 1349 the Halych area and some Ruthenian lands further north. Lithuania's situation improved from 1350, when Algirdas formed an alliance with the Principality of Tver. Halych was ceded by Lithuania, which brought peace with Poland in 1352. Secured by those alliances, Algirdas and Kęstutis embarked on the implementation of policies to expand Lithuania's territories further.
  Bryansk was taken in 1359, and in 1362, Algirdas captured Kiev after defeating the Mongols at the Battle of Blue Waters. Volhynia, Podolia and left-bank Ukraine were also incorporated. Kęstutis heroically fought for the survival of ethnic Lithuanians by attempting to repel about thirty incursions by the Teutonic Knights and their European guest fighters. Kęstutis also attacked the Teutonic possessions in Prussia on numerous occasions, but the Knights took Kaunas in 1362. The dispute with Poland renewed itself and was settled by the peace of 1366, when Lithuania gave up a part of Volhynia including Volodymyr. A peace with the Livonian Knights was also accomplished in 1367. In 1368, 1370 and 1372, Algirdas invaded the Grand Duchy of Moscow and each time approached Moscow itself. An "eternal" peace (the Treaty of Lyubutsk) was concluded after the last attempt, and it was much needed by Lithuania due to its involvement in heavy fighting with the Knights again in 1373–1377.
  The two brothers and Gediminas' other offspring left many ambitious sons with inherited territory. Their rivalry weakened the country in the face of the Teutonic expansion and the newly assertive Grand Duchy of Moscow, buoyed by the 1380 victory over the Golden Horde at the Battle of Kulikovo and intent on the unification of all Rus' lands under its rule.
caption: 16th-century image of Algirdas, one of the great rulers of 14th-century Europe
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