Castelnuovo Magra is mainly known for its ancient castle which was once the capital of the Bishop of Luni's domain. The castle had been originally built in the 12th century by Bishop Walter and then later completed by Henry of Fucecchio who developed the Code Pelavicino. Quite a lot of changes and additions have been made to the castle over the centuries. Today, visitors can see the remains of the large ancient walls, the masonry sections of the original castle and the large tower which had a rectangular plan.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.