Holstenshuus estate was first time mentioned in 1314. It is known as Holstenshuus since 1723, whe the estate was acquired by Christian Adolph Holsten. The oldest wing of the current castle was built in 1579 by Knud Venstermand. Two other wings date from 1643. The major restoration was made in 1863-1868 and again in 1910 after a great fire. The surrounding Rococo park (established in 1753) is open to the public.
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.