Wenceslas I of Saxe-Wittenberg

Wenceslas I (c. 1337–1388), son of Rudolf I, succeeded his brother Rudolf II as Duke and Elector of Saxe-Wittenberg in 1370. As elector he helped elect Wenceslas IV of Bohemia King of the Romans in 1376 and stood by Charles IV.

Charles IV invested Wenceslas and his nephew Albert with Brunswick-Lüneburg, but their claim failed in the Lüneburg War of Succession, and Wenceslas was defeated in 1388. He died on 15 May 1388 during the siege of Celle, amid rumours of poison.