50 litas coin issued to honour Algirdas, the Grand Duke of Lithuania (From the series The Rulers of Lithuania).
Algirdas or Olgerd (c. 1296 – May, 1377) was a monarch of medieval Lithuania. Algirdas ruled the Grand Duchy of Lithuania from 1345 to 1377, which chiefly meant monarch of Lithuanians and Ruthenians. With the help of his brother Kęstutis, who defended western border of Duchy he created a vast empire stretching from the Baltics to the Black Sea and reaching within fifty miles of Moscow.