Burg Horn, Medieval castle in Horn-Bad Meinberg, Germany.

Burg Horn is a stone castle in Horn-Bad Meinberg whose defense towers and fortified walls rise above the surrounding landscape. The structure displays the practical design of medieval military architecture with distinct sections for protection and governance.

The castle was built in medieval times as a strategic stronghold to control important trade routes in the region. Over centuries it changed hands and adapted to shifting political circumstances that shaped the area.

The castle hosts medieval festivals and exhibitions where visitors experience how the region celebrated and lived during earlier centuries. These events reveal how deeply rooted the local identity remains connected to the fortress and its past.

The castle stands at the northern edge of Horn's medieval town centre, about 230 metres above sea level. Parts of the non-commercialised castle can be visited during a museum visit; the upper floor houses the local history museum run by the Heimatverein. The adjacent police station is in a separate administrative building.

The baroque staircase added under Count Hermann Adolf zur Lippe in 1656–1659 has a portal bearing the year 1659 and the coats of arms of its builders. The bergfried lost its third floor in the 18th century and regained it, with a new roof, during the 1983–1989 restoration.