Bizeljsko Castle consists of a residential part that forms the centre of the complex and includes a Baroque chapel, and an outer part that served a defensive purpose.
The castle was mentioned for the first time in written sources in 1404. In 1532 the Tattenbachs came to the castle and were in possession of it until 1671. Later the name Windischgraetz was among its famous owners. The oldest parts of the now visible structure dates from the 14th century, and the castle has been rebuilt and extended gradually over the centuries.
The castle preserves the form of Gothic elements, an arched yard and the chapel of St. Hieronymus, dating to the year 1623. The outer defence zone with its wall and towers is partly in ruins. The residential part is comprised of diverse tracts which surround a modest arcade courtyard from the 17th century. Arcades in the inner courtyard are painted and have been partly added on to, though unsuitably.
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.