The Château de Careil is a fortified house constructed from the end of the 14th century and enlarged in the 15th and 16th centuries. The manor had originally a defensive function, as witnessed by the crenellated curtain wall which still exists. Under the Reformation, it served as a place of worship for the protestants established in the Guérande peninsula. For this reason, it was attacked and pillaged on 11 May 1589 by the Catholic League. In 1699, some time after the Revocation of the Edict of Nantes, the manor was siezed and sold to a Catholic family. After becoming a restaurant in 1924, the site is currently a visitors' centre. A third wing of the building no longer exists; it was destroyed in an accidental fire in the 18th century.
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.