Schloss Ebelsberg

Schloss Ebelsberg stands as an irregular quadrilateral, almost trapezoidal in plan, constructed as a two-storey ensemble around a trapezoidal inner courtyard. The surviving composition includes three towers and two principal gates, the Linz Gate facing the market side and the Ennser Gate on the east. The courtyard is accessed today through the Linz Gate in the west wing and the Ennser Gate to the east. After the 1825 rebuilding the yard was raised by roughly two metres with rubble, which led to the closure of the original market-facing main entrance and the principal access being shifted toward the park.

The site preserves its medieval defensive layout in both earthworks and masonry. Three sides remain set high above the surrounding plain while the fourth side formerly stood behind a double moat with a bridge. Multiple successive curtain walls and foreworks survive in their lines, and two eastward neck ditches with bridges appear on historic plans and in the fabric. These elements reflect the layered fortifications described in 15th- and 18th-century accounts.

Towers and stair enclosures show a long sequence of building. The stump of an early gate tower belongs to the oldest phase, and a southeast gate tower is probably twelfth century. Two polygonal stair towers predate the nineteenth century and keep their sixteenth-century vaulted ceilings. One stair tower has a cross-ribbed vault (a vaulted ceiling with intersecting ribs); the other preserves an eight-part groin vault (a ceiling formed where barrel vaults cross to make eight surfaces). The stair treads are of Untersberger marble and survive in place.

The two main gates display different historic vaulting and finish. The Ennser Gate projects slightly from the east façade and its entrance vault uses a cross vault set between ribs, reworked after 1826. The Linz Gate rises above the surrounding roofs, ends in a battlemented cornice beneath a flat roof, and its gate passage dates to the sixteenth century with a barrel vault strengthened by diagonal ribs.

Subterranean spaces form a coherent vaulted block beneath the south and west ranges. Cellars here form two levels of vaulting; walls remain unplastered so the varied masonry is visible. The north tract once housed a beer cellar that has since been filled and blocked, while the east tract lacks cellarage. A large square wine cellar survives with a central dressed stone pillar carrying four pointed brick cross-vaults. Masonry combines reused smooth sandstone ashlar (dressed squared stone), mixed rubble and brick, and distinct zones of different construction that reflect successive building phases dated to the fifteenth and sixteenth centuries.

Interior rooms and fittings show both medieval framework and nineteenth-century reworking. The former kitchen in the south range has a barrel vault with transverse ribs and now serves as a salon or exhibition space. The upper floor of the west wing is a run of five rooms furnished in nineteenth-century taste, with Bohemian glass chandeliers, Swedish tiled stoves and decorative features from the Empire and late-Biedermeier periods. A tower room known as the China room is reached through a bronze door decorated with a lyre motif and reliefs of Diana and Apollo and contains an Empire ceramic stove with figural decoration.

The principal stair and courtyard forestructure date to the early nineteenth-century rebuilding. The main stair in the south wing rises steeply in a single run, then divides into two half-round flights that open into a generous vestibule. A glazed wooden balcony or veranda on the south courtyard wall is carried on two Doric granite columns and served as the porch to that nineteenth-century stair. Decorative and structural materials across the complex include Untersberger marble steps, granite for the Doric columns, brick vaulting, reused sandstone ashlar blocks, and stuccoed façade surfaces applied in later phases. Sculpted heraldic stones bearing the Passau episcopal arms and later the Kast family arms appear above gates and in the courtyard.

After the 1826–27 rebuilding the top storey was removed and the remaining levels were made uniform, a continuous corridor was installed around the courtyard, and room functions were reorganised: the south wing for representational and residential use, the east and lower north zones for economic purposes, and the west wing for administration. Many of these alterations survive in the present fabric, although roofs and some upper structures have been repaired or rebuilt in the nineteenth and twentieth centuries, and storm damage in 2007 affected roof timbers and a tower while leaving features such as the courtyard fountain and a wooden oriel intact. Excavation below the floors has produced Roman-period, Gothic and modern ceramics and numerous human skeletal remains, which add an important layer of evidence about the site’s long human history.