Alexander I., emperor of Russia, son and successor of Paul I., took part in the European strife against the encroachments of Napoleon, was present at the battle of Austerlitz, fought the French at Pultusk and Eylau, was defeated at Friedland, had an interview with Napoleon at Tilsit in 1813, entered into a coalition with the other Powers against France, which ended in the capture of Paris and the abdication of Napoleon in 1814. Under his reign Russia rose into political importance in Europe (1777‒1825).
Definition taken from The Nuttall Encyclopædia, edited by the Reverend James Wood (1907)
Alexander III. * Alexander II.