The history of Tibrandsholm is a mystery in Swedish history. The first written record date from 1402, when Margaret I of Denmark ordered to demolish it. The castle was probably owned by castle steward Tibrand. He belonged perhaps to Victual Brothers who fought against the Kalmar Union. In the 17th century during Swedish-Denmark wars Tibrandsholm was a soldier camp and execution place. There are also remains of Bronze, Iron and Viking Age settlements around Tibrandsholm.
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.