architectural presentation and static protection of the remains of Haasberg Castle in Planina, Postojna
Haasberg Manor is one of the most important Baroque manors in Slovenia. It is located on the southwestern edge of Planinsko polje, on a terrace above the floodplain karst field formed by the Unica River. The owners of the Old Castle from the 13th century, the noble family Eggenberg, built a castle, the predecessor of today’s manor, at the foot of the hill in the 17th century. In 1716, their estate was inherited by the Italian noble family Cobenzl and transformed into the grandly designed Baroque manor Haasberg, which also included the exceptional natural environment in its architectural design. The manor is the work of the Baroque architect Carlo Martinuzzi (1673–1726), who worked in the early 18th century, mainly in the Carniola region, and to who we can also attribute the authorship of the Ursuline church and monastery in Ljubljana. When the Cobenzl family died in 1810, it was inherited by the Coronini family, in 1846, the castle passed into the ownership of the influential Austrian noble family Windischgrätz, who richly furnished it and hosted several prominent representatives of cultural and political life at the turn of the 19th and 20th centuries, such as Emperors Franz Joseph I and Charles I.
The castle was badly damaged in World War II, and its restoration in the following decades was slow and with great difficulty, which led to the preservation of only its outer walls and a small number of higher-quality building fragments. The earthquake that caused the collapse of part of the entrance facade on December 29, 2020, drew attention to the great danger to the remains and their increasingly rapid deterioration.
The project involves the partial reconstruction of the ruins of the castle with the aim of presenting them and preventing further deterioration. During the design process, several options for supporting the perimeter walls with internal or external secondary prefabricated structures were tested, but from the perspective of both the protection of the monument and its presentation, the most optimal option was to strengthen the perimeter facades by reconstructing the internal transverse walls, over which a new enfilade runs along the entire length of the castle. The enfilade is crossed by a walking and viewing ramp, with views to both, the remains of the castle and its exceptional landscape context. The ramp connects the fragments of the remains, which are arranged along the vertically varied Baroque axis – the main and highest quality architectural element of the castle.












