The knights of the Teutonic Order originally founded the Alden Biesen commandery in the 11th century, but the current buildings were constructed between the 16th and 18th centuries. It was the headquarters of a bailiwick or province of the Teutonic Order in the region of the Maas and Rhine. On 8 March 1971 the building burnt down and was acquired by the government and restored. In addition to the moated castle, the complex contains a church and gardens.
The castle is used today as a cultural centre and conference centre. Festivals such as the Scottish weekend or the International Story Festival are held there.
References:The Church of St Donatus name refers to Donatus of Zadar, who began construction on this church in the 9th century and ended it on the northeastern part of the Roman forum. It is the largest Pre-Romanesque building in Croatia.
The beginning of the building of the church was placed to the second half of the 8th century, and it is supposed to have been completed in the 9th century. The Zadar bishop and diplomat Donat (8th and 9th centuries) is credited with the building of the church. He led the representations of the Dalmatian cities to Constantinople and Charles the Great, which is why this church bears slight resemblance to Charlemagne's court chapels, especially the one in Aachen, and also to the Basilica of San Vitale in Ravenna. It belongs to the Pre-Romanesque architectural period.
The circular church, formerly domed, is 27 m high and is characterised by simplicity and technical primitivism.