The Mount Ursino Castle was destroyed by a fire around 900 and rebuilt on the hill. It is mentioned in 1004 in a document and defined fortified village. After the construction of a first tower on top of the hill, the fortress was enlarged repeatedly until reaching its present form around the 15th century, embracing even the baby village in the Piana, current historical center, while it was gradually abandoned that in hill. Supporters of this structure medieval military were mainly the Del Carretto family, the feudal lords of Noli. The castle was able to control both the sea and the coast that the old Roman road passing in the hill in the locality of Voze, and used until the 18th century.
The castle is formed on the top by a cylindrical tower, surrounded by massive walls and from the accommodation for the troop. From this main core descended two walled perimeters, largely still preserved today, which embraced the whole hill and subsequently also the village downstream. Circular towers susseguivano it at regular intervals along the sloping walls on the sides of the Monte Ursino. The access doors were defended by a singular system still today partly preserved that was constituted by an external tower to walls and connected thereto via a walkway in masonry. This allowed to defend the access doors from the outside by hitting enemies from behind. The castle and the walls of the village are among the examples of medieval fortification best preserved in the Ligurian Ponente.
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.