The Castle of Châteauneuf-du-Pape was probably originally a Roman castrum destroyed during the great invasions. A 913 charter referred to the castellum de Leri. The first mention of a Castro Novo (new fortified village), which led to the name Châteauneuf, did not appear until 1048. In 1077 the keep was built there. Throughout the Middle Ages, the old château was a watchtower and a toll gate on the Rhône that passed to various families allied to the house of Albaron. Only a tower remained in 1146, and by 1283 it was already being referred to as 'the old tower'.
Jacques d'Euze, previously the bishop of Avignon, was elected pope in 1316 and took the name John XXII. Châteauneuf fell directly under his authority. Then in 1317 he decided to build a new château above the village. It was finished in 1333. Due to its size and location its function was essentially defensive At the same time, in 1318, he circled it with ramparts.
After the Popes returned to Rome in the early 15th century, the castle was abandoned, for the bishops did not have the means to maintain the castle. During the years which followed, the castle underwent the vicissitudes of time, including times of strife such as the Wars of Religion in the 16th century. In 1892 it was ranked as a historical monument, and was again damaged during the World War II.
Today, all that remains is a sungeon, the southern wall, and the lower pontifical cellar. The castle is the emblem of the town of Châteauneuf-du-Pape and is often used for local receptions and wine events, such as the Councils of the Echansonnerie des Papes, the Bacchic Brotherhood of Châteauneuf-du-Pape Wines.
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.