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Heritage classified

Key figures

Origin and history

The castle of Simiane-la-Rotonde, also known as Château des Agoult, is a medieval building overlooking the village of the same name, located on the Albion plateau in the Alpes-de-Haute-Provence. It is mainly known for its Romanesque dungeon, nicknamed "the rotunda", a dodecagonal construction dating from the late twelfth or early thirteenth century (between 1190 and 1210). This dungeon is home to a remarkable showroom, considered one of the most accomplished achievements of Provencal Romanesque art. Originally, the castle was a castrum attested as early as 1031, then transformed into a seigneurial residence with a house of the 13th-XIVth centuries.

The rotunda, often interpreted as a castral chapel or a dungeon with a defensive and symbolic vocation, rests on a crypt that would have housed the tomb of Raimbaud d'Agoult, crossed dead in 1113. Its scholarly architecture includes a noble room on the first floor, surmounted by a converging rib dome towards a zenithal oculus, and decorated with sculptures (human masks, plant capitals). The site, abandoned from the 16th century, suffered collapses in the 18th century. Confiscated during the Revolution after the execution of his last owner, Gabriel Louis François de Neufville de Villeroy (guillotine in 1794), he was returned to the family under Napoleon before being sold in 1803.

Ranked a historic monument in 1862 for its rotunda, then in 2000 for the whole seigneurial house and its remains (premises, cisterns, wells), the castle benefited from major restorations, notably in 1875 by architect Henri Révoil and in 1979-1980. Open to the public since 1986, it now hosts exhibitions and cultural events. Prosper Mérimée, during his visit in 1852, contributed to his heritage. The assumptions about its function (lantern of the dead, dungeon, chapel) have evolved, but its exceptional character in Provencal Romanesque architecture remains undisputed.

The exterior architecture of the rotunda contrasts between a north-west facade in rustic rubble and a southeast elevation in cut stone, decorated with a blind ogival bay and a carved Romanesque door. Inside, the round room is surrounded by twelve niches separated by columns, while the capitals mix stylized plant motifs (palmettes, tripane leaves) and expressive human masks (monk, devil, gag). These elements illustrate the religious, symbolic and defensive influence of the monument.

After the Revolution, the seigneurial house, occupied by various owners in the 19th century, suffered internal partitioning. Today the communal property, the castle is freely or guided from March to December. Its history reflects the transformations of a medieval site from fortress to heritage symbol, while preserving architectural puzzles, such as the exact destination of its dodecagonal rotunda.

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