The most interesting monument to visit in Varese Ligure is the ancient castle which is now a private property. It was built in 15th century and it was the abode of leaders of the town. The building took a part of an original defence structure of the town. In the Middle Ages was created a Borgo Rotondo (Round Hamlet) and the Castle completed the defence circle. Nowadays the Castle became an exhibition area where you can see the exhibitions of the local artists.
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.