Steyregg Castle dates back to the late 11th century (a similar structure, most likely made from wood, was there already before the turn of the last millenium). After the castle had been hit by two fires in the 18th century the original architecture remained largely untouched afterwards.
The castle was carefully renovated and extended in 2004 and its splendid rooms can be rented for private events. Especially beautiful is the castle chapel (late 13th – early 14th century) with its magnificent gothic frescoes from the 14th century (redone in baroque style in 1680). Parts of Steyregg's former city walls are still in good condition.
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.