Heriboldisburg, Medieval castle ruin near Herbolzheim, Germany

Heriboldisburg is a castle ruin near Herbolzheim in Germany, where a round stone tower and sections of the original defensive walls still stand. The tower has been reinforced in recent years and is now safe for visitors to explore the remains of this medieval fortification.

The castle grew out of a manor farm moved to the left bank of the Jagst, probably after the Hungarian invasions of the early 10th century, and was built in the 12th century as the seat of the Knights of Herbolzheim, first mentioned in 1268. Around 1330 the castle and village passed to the Bishopric of Worms, and through pledges and sales to Mainz in 1362. Its destruction is undated; the knights died out in the late 15th century.

The name Heriboldesburg comes from a 1902 schoolbook that misread the village name as Heriboldesheim; it has no historical basis. The castle itself was probably never given a name and appears in records only as the castle or Schloss zu Herbolzheim, a term tied to manorial rights rather than to any grand building.

The ruin stands on a private estate and is not open to visitors; the tower and walls can only be viewed from outside. The site lies on a hill spur above the Jagst valley near Herbolzheim, so reaching it means walking uphill on uneven ground.

The name Heriboldesburg comes from a 1902 schoolbook that misread the village name Herbolzheim as "Heriboldesheim"; it has no historical basis. The castle itself was probably never given a name and appears in records only as the castle or Schloss zu Herbolzheim. According to the 1790 town council minutes, its stones were used to build the Jagst bridge.