Wildberg Castle, first documented in 1145, stands as the oldest castle complex in the Mühlviertel region of Upper Austria. The fortification served as a temporary prison for Bohemian King Wenzel in 1394 and has remained under the Starhemberg family's stewardship since the High Middle Ages. Its architecture encompasses medieval fortifications, Renaissance arcades from the mid-16th century, and Baroque structures, now meticulously restored and operating as an educational venue hosting seminars and cultural events in its atmospheric medieval spaces.