Algirdas ( - May 1377) was Grand Duke of Lithuania from 1345 to 1377. With the help of his brother Kestutis (who defended the western border of the Duchy), he created an empire stretching from the present Baltic states to the Black Sea and to within 80 km of Moscow.

Early life and rise to power

Algirdas was one of the seven sons of Grand Duke Gediminas.

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