Castle Hartberg, Medieval castle in Hartberg, Austria

Castle Hartberg is a medieval fortification situated at the end of the city walls, combining defensive features with residential design. The building displays construction elements from multiple centuries that were added and modified over time.

The castle originated as a medieval fortification and was later developed into a noble residence. It formed part of Hartberg's defensive system alongside the city walls and the Reckturm tower.

The castle's name recalls the Paar family, who owned it from 1571 and again from 1756; Johann Baptist von Paar rebuilt it as a Renaissance residence between 1576 and 1584. At the park gate on Herrengasse, an inscription panel of Johann Baptist and his wife Afra, born Haim, dated 1584 and 1598, survives from the demolished castle chapel. The Rittersaal on the second floor remains open for public events, while the former stables house a restaurant.

The castle stands at the foot of the Ringkogel in the northwest of Hartberg's old town, bordered by sections of the town wall and the Reckturm. The Stadtpark lies to the west, the Schlosspark and Herrengasse to the south. The Rittersaal on the second floor remains open for public events, and a restaurant occupies the former horse stables.

The castle is tightly woven into Hartberg's defensive system, showing how fortifications and living quarters were squeezed into one space. This practical solution was typical for towns that needed both protection and a residence for their rulers.