Four onion towers attest to the formidability of the prior fortress. Four stairways lead to several terraces that afford views far into the countryside. It has housed a secondary school since 1951 specializing in agriculture and dietics.
Sitzenberg is an ancient town and the castle was once known as "Sitz- am- Berg” (seat on the mountain). It was the property of the Styrian princes as early as the 12th c; later of the Vogt (reeve) of the cathedral chapter of Regensburg and of Duke Friedrich II, the Quarrelsome, who then enfeoffed the castle to a vassal.
There is a lovely pond near Sitzenberg Castle.
Top cultural events are staged at the castle including concerts and a summer festival every summer.