Ruine Klöch, Medieval castle ruins in Klöch, Austria

Ruine Klöch is a medieval castle located on a hilltop in Styria. The remains consist of stone walls that command views across the surrounding countryside with fields and settlements.

Built probably in the first half of the 14th century by Otto der Wolfsauer, the border fortress was first documented in 1365, when Friedrich Wolfsauer received it as a fief from Duke Rudolf. Its administrators' descendants called themselves "Ritter von Klech". Debt forced the Wolfsauers to sell to the Emmerbergs; a 1444 charter records that wine was already grown at Klöch. Abandoned in the 18th century, it passed to the Stürgkh family in 1724.

The ruins show how medieval builders constructed fortifications and planned defensive structures. Today visitors can see these ancient construction techniques directly in the remaining stone walls.

The ruins are reached by following marked hiking paths from the village center, with parking available near the trail entrance. The walk to the hilltop is straightforward to follow, though sturdy footwear is recommended for the terrain.

The 8 × 8 m residential tower retains an internal spiral staircase, and its second upper floor held a chapel whose vaulting is still visible. A viewing platform was placed on the tower in 1998 by architects Walter Jartschitsch and Herwig Moosbrugger.