Pottenburg, Castle ruin in Wolfsthal, Austria.

Pottenburg is a castle ruin in Wolfsthal featuring a quadrangular keep with substantial height and walls built from rubble stone with shaped corner blocks. The structure contains multiple floor levels and was designed as a fortification.

The first documented mention dates from 1256, though some authors place fortifications between 990 and 1025. Count Poto, son of Palatine Hartwig of Regensburg, lost the castle after backing Duke Konrad of Bavaria against Emperor Henry III in 1054. In 1226 it became a princely fief, and Matthias Corvinus held it from 1482 to 1492.

The name derives from the medieval owner Count Poto, and the ruin still shows the regional defensive building style with its high keep and outer walls. Visitors can see the sturdy construction that was typical for fortifications of that time.

The ruin sits east of Wolfsthal toward Berg and can be reached by road with parking available nearby. Walking access is straightforward, and the location offers clear views of the structure from outside.

The keep stands about 26.5 m high, not 30 m, and its walls are some 3.5 m thick. A high entrance on the east side matches one in the opposite palas wall, suggesting a bridge once linked the two buildings. The tower's lower floors carry cross-ribbed vaults, reached by stairs set into the wall thickness.