The Rudelsburg is a ruined hill castle located on the east bank of the river Saale above Saaleck, a village in the borough of Naumburg in the county of Burgenlandkreis in Saxony-Anhalt, Germany. The Rudelsburg was built in the Middle Ages by the Bishop of Naumburg and served to secure trade routes such as the Via Regia through the Saale Valley.
The Rudelsburg was a point of conflict between the bishops of Naumburg and the Margraves of Meissen belonging to the House of Wettin. The castle occasionally served various noble families as a residence, until it was destroyed in the Thirty Years' War and thereafter fell into disrepair. In the early 19th century the Rudelsburg became a popular tourist destination thanks to the romanticisation of mountains and the rise of hiking as a pastime. From 1855 onwards it achieved national renown as the annual meeting place of the Kösener Senioren-Convents-Verband, the oldest union of student fraternities with delegates from all German-speaking countries. The Rudelsburg still maintains a particular attraction for visitors and lies on the Romanesque Road, a tourist route.