Schloss Mailberg, Medieval château in Mailberg, Austria

Schloss Mailberg stands on a hill at the southern edge of the village of Mailberg. The complex is made of connected wings: a long, low white building with a reddish-brown tiled roof and small, evenly spaced windows runs across the centre; to its left a taller white block with a broad reddish roof and a triangular gable; on the right a round white tower with a conical reddish roof rises above a white wing with a steep roof and dormer windows. The buildings sit at the edge of a wooded slope above the village.

Chadolt von Zogelsdorf gave lands to the Knights of St John in 1146, and the order built a fortified monastery with hospital and church south of Mailberg; Emperor Frederick I confirmed the possession on 17 September 1156. In 1451 the estates of Upper and Lower Austria met here and sealed the Mailberger Bund with 250 seals, demanding the release of Ladislaus Postumus from Frederick III's guardianship. Commander Karl Tettauer had the building rebuilt from 1594 as a late Renaissance château, and Anton von Colloredo-Waldsee extended it in Baroque form from 1752; a fire struck in 1788.

The castle church, dedicated to St John the Baptist, is part of the complex and still hosts services, which visitors may attend alongside guided tours of the castle. The vaulted cellar holds a restaurant and wine shop selling wines of the Schlossweingut Malteser Ritterorden and the Mailberg Valley growers' association.

The castle is reachable by regional train to Mailberg station, followed by a short walk into the village. Since the location is in a rural area, plan ahead for travel time and check train schedules before visiting.

The castle operates as a hotel today, allowing guests to sleep within its medieval walls. This use is uncommon for Austrian castles and merges defense history with modern comfort.