Hochburg castle was founded probably by Dietrich von Hachberg in the 11th century - although the first written mention dates from 1127. Between 1553-1577 the fortifications were completely remodeled and seven bastions were added in the early 1600s. Hochburg was however destroyed by catholic forces in the Thirty Years' War in 1634-1636. The reconstruction and modernization took place in 1660-1678, but it was again destroyed by German volunteers in 1681 to prevent an attack by French forces. The final destruction occured in 1688 by troops of Louis XIV.
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.