The mansion was originally built by the noble house of Eggenberg in the 17th century.
It served as a prominent social and cultural center for the local aristocracy until the mid-20th century.
The structure was noted for its extensive gardens and parkland that integrated with the natural karst topography.
During the Second World War, the building was occupied by forces before being destroyed by fire during a partisan attack.
The Prince of Windischgrätz resided here and famously held a massive collection of art and library archives that were largely lost or displaced during the fire.
The remains are protected as a site of cultural heritage under Slovenian state jurisdiction.
Dvorec Hošperk, known as Haasberg, is the partially preserved ruin of a 17th-century Baroque mansion located in the village of Planina, Slovenia. Constructed on the site of an earlier medieval fortress, the mansion once served as the central manor for the Windischgrätz noble family. The structure suffered severe damage during the Second World War when it was burned down in 1944. Today, the site consists of significant stone masonry shell remains, including surviving walls and archways that provide a glimpse into its former residential scale. It is situated within the karst landscape of the Notranjska region near the Planina Polje wetland area. The ruins are currently accessible to the public, offering an open-air historical viewing experience rather than an enclosed museum environment.
The central arched courtyard entrance which highlights the scale of the original architectural design.
Wear sturdy, closed-toe footwear as the ground inside the ruins is uneven and littered with loose stones.
Bring a flashlight if you plan to investigate the lower masonry levels in low light.
Combine your visit with a hike through the nearby Planina Polje to see the karst landscapes.
Attempting to climb the unstable high walls or entering areas marked with warning tape.
The site is an unprotected ruin accessible at all times, though visitation is best during daylight hours.
Do not climb on the loose wall structures for safety and heritage preservation reasons; practice leave-no-trace principles.
