The Dalaborg Castle was built in 1304 by dukes Erik and Valdemar (the sons of Magnus Ladulås) during the war against the king Birger. The castle was destroyed in 1434 in the so-called Engelbrekt uprising. The Queen Margareta, regent of Norway and Denmark, was named also as a regent of Sweden in Dalaborg in 1388.
Today the moat, ramparts, a terrace and the cellar of a blockhouse remain of castle. A model of Dalaborg before it was destroyed can be seen at Mellerud Museum.
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.