The predecessor of the present Tüschenbroich Castle was built around 800. It stood on the large round motte in the present castle lake. This medieval castle however was completely destroyed during the Thirty Years' War (1618–1648).
Between the 17th and the 18th century the present castle was built on the site of the older outer ward.
In 1876 the southern tower and part of the main building collapsed during a storm. The remaining part was given a new facade and the collapsed part was never rebuilt. Of that southern tower only a ruin remains.
At present Tüschenbroich Castle is privately inhabited and can thus not be visited.
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.