Rudolf of Rheinfelden | |
|---|---|
| Duke of Swabia | |
 Bronze graveslab, Merseburg Cathedral | |
| Born | c. 1025 |
| Died | 15 October 1080 Hohenmölsen, Saxon Eastern March |
| Buried | Merseburg Cathedral |
| Spouse(s) | Matilda of Swabia Adelaide of Savoy |
| Issue | |
| Father | Kuno of Rheinfelden |
Rudolf of Rheinfelden (c. 1025 – 15 October 1080) was Duke of Swabia from 1057 to 1079. Initially a follower of his brother-in-law, the Salian emperor Henry IV, his election as German anti-king in 1077 marked the outbreak of the Great Saxon Revolt and the first phase of open conflict in the Investiture Controversy between Emperor and Papacy. After a series of armed conflicts, Rudolf succumbed to his injuries after his forces defeated Henry's in the Battle on the Elster.