Helfenberg Castle is a Renaissance fortification located above the village of Helfenberg in the Rohrbach district of Upper Austria. Originally a modest fortification built around 1250 as documented by its founder 'Wirint de Helfenberch,' the castle underwent major expansion in 1285 under the lords of Piber. Completely rebuilt in 1607 by Hans Christoph von Oedt 300 meters above the previous site, it featured an extensive library and represented a dramatic architectural transformation. The castle passed through various noble families before becoming property of Countess Olympia Revertera-Salandra in 1893.
