Château de Gréolières was mentioned first time in 1047 when it belonged to the Viscounts of Nice. Counts of Provence decided at the end of the 12th century to enforce eastern part of Provence against the influence of the Republic of Genoa and local nobility. To control the area of Gréolières, the Count of Provence built the new castle around 1220.
In 1235 Count of Provence gave the castle to Romée de Villeneuve. The castle remained in the hands of his descendants, the lords of Villeneuve-Vence, until the French Revolution. The castle and the village were plundered in 1385 during the clashes between Charles de Duras and Louis II of Anjou.
During the Wars of Religion, in 1574, the castle was attacked by Huguenots and again in 1590 by Duke of Savoy. The castle was restored in the early 17th century, but bombed again during the War of Austrian Succession in 1747 by the Austro-Sardinian troops.
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.