San Giorgio Monferrato Castle originates from the 10th century and is well-preserved. The Monferrato family built massive walls in the 15th century. It was damaged by Spanish army in the early 1700s.
Built on five above-ground storeys, plus attic and tower for a total of about 4300 square metres of floor space and more than 5000 covered (the difference between the two measurements is given by the thickness of the ancient walls), the property also has an Italian-style garden, a small hanging garden, two majestic panoramic terraces with views sweeping from the plains to the Alpine arc, and a centuries-old park of about 3.6 hectares.
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.