Burgruine Igelsburg, Medieval castle ruins in Dörnberg, Germany.

Burgruine Igelsburg is a castle ruin that sits on a steep basalt hill surrounded by forest and overlooks the surrounding landscape. The remains consist of stone foundations and wall fragments that show where towers and residential buildings once stood.

The wooden palisade castle's construction date is uncertain; it may have served Charlemagne's troops as a strategic outpost during the Saxon Wars (772–804). Historians believe the Freiherren von Dörnberg, first mentioned in the Habichtswald area in 1100, had their seat here. The wooden houses probably fell into decay in the 12th or 13th century.

The name Igelsburg derives from Old High German for "dwarf castle"; it was first called Engelsburg. Near the former castle a panel with drawings shows four houses inside four ring walls, two on the summit and two lower down, suggesting the site was not a classic castle. The hill was formerly called Junkerkopf by locals.

The site is reachable on foot via hiking trails that wind through the surrounding forests and are well marked. It is advisable to wear sturdy shoes, as the trails can be muddy or uneven depending on the season.

The pottery workshop was not inside the castle walls: it stood on a small hill on the meadows and fields a little west of the castle, where two small ponds in the forest supplied the water for slaking clay. Excavations in 1969 dated the workshop to between 1350 and 1450, and its sherds suggest vessels for ordinary citizens.