Quart castle is a set of buildings arranged within a fortified perimeter, which respects the natural contour of a difficult rocky slope.The donjon (keep) standing on the highest point of the rock, the functional layout of individual buildings, the chapel and the winding passageways, are evidence of an early or Germanic fortified structure, although current architectural evidence point to more recent periods, as do the first narrative sources, which suggest its origins go back to the end of the 12th century (around 1185).
After the death of Henry of Quart in 1377, the castle and fiefdom went to the Savoys, who sold it to Philibert Laschis in 1550, who in turn sold it almost immediately to the Balbis. In the 17th century, the castle belonged first to Count Nicholas Coardo and then to the Perrone of San Martino, who gave it the Municipality of Quart in 1800.
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.