Vimianzo Castle construction began in the 13th century and was completed during the 14th and 15th centuries. It is in an excellent state of preservation. Its walls are surrounded by a moat over which a drawbridge is lowered. The building was constructed in a polygonal design with four towers and an arms courtyard. Its walls, almost two metres thick, withstood numerous attacks during the Irmandiñas (Brotherhoods) Wars. It was the object of fierce disputes between the Archbishop of Compostela and the Moscoso family, two of the greatest powers in Medieval Galicia.
For centuries it was the residence of the Counts of Altamira, until it was sold to the Martelo family. Finally it was passed into the hands of the A Coruña Provincial Government, which restored it and put it to public use.
In its interior we can visit a very interesting ethnographic museum, which contains examples of the craft specialities of the region, from stonework to baskets, as well as lace, ceramics, clogs and linen items, amongst others.
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.