Schloss Grafenegg, originally a small settlement called Espersdorf in 1294, evolved into its present form over centuries. It received its name in the 15th century and went through various ownership changes, passing to Holy Roman Emperor Frederick III and later the Thurzó family. In the 17th century, it was fortified by Johann Baptist Verda von Verdenberg during the Thirty Years' War.
The castle's transformation continued in the 19th century under the Breuner-Enckevoirt family, who reconstructed it in the romantic historicism style. The financial crisis of 1873 halted some planned expansions, preserving the castle's character. Marie Breunner-Enckevoirth inherited it and passed it on to the ducal house of Ratibor and Corvey when she married Viktor II, Duke of Ratibor and Prince of Corvey.
While not their main residence, the castle remained in their possession until it was heavily damaged during the Russian occupation in 1945-1955. Restoration efforts by Franz-Albrecht, who adopted the Metternich-Sandór name, began in 1967, with support from Austrian authorities. Today, Schloss Grafenegg is open to the public.
The 19th century conversion by the architects Leopold and Hugo Ernst left the nucleus of the existing building almost fully intact. However, they gave the castle exterior a completely different impression by adding stepped gables, arcades and facade decoration in a neo-gothic Tudor style. Ludwig Wächtler was responsible for the interior decoration, which was largely in Renaissance Revival architecture. The closed complex consists of four wings arranged around an inner courtyard.
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.