Château de Saint-Denis-sur-Loire dates originally from the early Middle Ages. It was enlarged in the 13th century and acquired by Philippe Hurault in 1341. It still belongs to the successors of Hurault family. The castle was again restored in the 18th century.
This place is very famous, thanks to its thermal mineral water resort from more than a thousand year. During the 16th century Catherine de Medici and Marie de Medici, Queens of France, visited several times there. The baths were restored in 1851 and bottled mineral water was brought also to Paris.
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.