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| Rudolf III | |
|---|---|
| Duke of Saxe-Wittenberg | |
.jpg) Portrait by Lucas Cranach the Younger | |
| Elector of Saxony | |
| Reign | 1388–1419 |
| Predecessor | Wenceslaus I |
| Successor | Albert III |
| Born | c. 1378 Wittenberg, Saxony |
| Died | 11 June 1419 Bohemia |
| Burial | Franciscan monastery in Wittenberg |
| Spouse | Anna of Meissen Barbara of Legnica |
| House | Ascania |
| Father | Wenceslaus I, Duke of Saxe-Wittenberg |
| Mother | Cecilia of Carrara |
Rudolf III (c. 1378 – 11 June 1419), a member of the House of Ascania, was Duke of Saxe-Wittenberg and Elector of Saxony from 1388 until his death.