Castel d'Ario Castle was a strategic element of a defensive system into the Mantuan territory, together with Castelbelforte and Villimpenta Castles, placed on the borderline with Veneto.
Castel D'Ario Castle represents one of the main medieval fenced-in castles with a pentagonal shape. Five towers are visible, included that one at the entrance, where people can still see the location where there was a portcullis and the ruins of the opposite ravelin. A significant restoration of the praetorian Palace at the end of the 20th century has brought to life frescos at the walls of the first floor, with the escutcheons of the Scaligeris, the lords from Verona, owners of the Castle for twenty years in the second half of the 14th century.
One of the towers inside the castle is called Torre della Fame; the tower was called like this because in the middle of the 19th century some skeletons were found out in this place; probably they belonged to members of Pico della Mirandola and Bonacolsi families, locked up and starved here. A headstone on the castle door reminds to this event.
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.