The first document to mention the castle in Carovignot dates back to 1163. Since then, the fortress fell in the hands of several rulers, the Normans of Geoffrey III of Montescaglioso, the Swabians in 1194 and the Angevines in 1306. In 1382 it passed to the prince of Taranto Raimondo del Balzo Orsini who then bequeathed it to his wife, queen Maria of Enghien, countess of Lecce.
The present appearance of the castle is due to recontruction works carried out between 1300's and the 1400's on a previous building. The rare triangular plan features angular towers connected to each other by curtain walls. The whole upper level is slightly jutting, while the walls are thickly crenellated. The curvilinear tower further amplifies the impression of a military building and unveils the Senese influence of the architect Francesco di Giorgio Martini.
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.