The main sights of Zavattarello is the castle, also known as Castello Del Verme, which overlooks the town. It was built in the 10th century and was owned by Dal Verme family from 1390 until 1975.
Outside it is majestic and surrounded by a wide park. The view from its terraces is breathtaking, from which you can see the Alpine Garden of Pietra Corva, that has very peculiar plants.
Now in the castle there is also a museum of modern art.
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.