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Origin and history

The octagon of Montmorillon is a Romanesque Romanesque chapel built in the 12th century, integrated into the enclosure of the Maison-Dieu founded around 1080-1085. Ranked a historical monument in 1840, it is distinguished by its regular octagonal plan, a rare form evoking the patted cross and symbolizing the Resurrection. Its architecture could be inspired by distant models such as the chapel of the Rock of Jerusalem (681) or the Palatine chapel of Aix-la-Chapelle (792), or by regional chapels now missing (Limoges, Peyrat-de-Bellac).

The chapel, built on an ossuary, has a double elevation and a remarkable sculpted decoration: 69 modillons (animals, monsters, human heads) and caps decorated with fleurons or grimaçant faces. Its facade features religious scenes such as the Annunciation or the four evangelists. The number 8, linked to eternity and spiritual rebirth, justifies its use for a ceramic chapel, where death was perceived as an entry into eternal life. A second smaller octagon, located nearby, probably served as a heater.

Loctogone underwent several major renovations: its dome frame and bell tower, built between 1611 and 1639, were destroyed in 1724. The restorations of 1997-1999 restored its 17th century appearance, with a campanile-shaped lantern. Sources evoke a sacralization of the site from the Roman Gaul, but no archaeological excavation confirmed these hypotheses. Founded by Robert du Puy on his return from the Holy Land, the chapel is part of an architectural tradition linked to European octagonal chapels, such as those of Puy-en-Velay or Torres del Rio (Spain).

Ranked among the historical monuments by the list of 1840, the chapel is part of a larger ensemble including a porch, a prioral house, and 17th century buildings. Its interior decor, now partially erased, included murals renewed over the centuries. The external modillons, typical of Romanesque art, illustrate various themes, ranging from fantastic bestiary to scenes of daily or religious life. Loctogone remains a rare testimony of medieval funeral architecture, mixing Christian symbolism and oriental influences.

The Maison-Dieu de Montmorillon, to which the octagon was attached, was a hospital and religious establishment founded at the end of the 11th century. Its role included welcoming pilgrims and sick people in a region marked by roads to Santiago de Compostela. The octagonal chapel, with its symbolism of rebirth, was perfectly integrated into this vocation, offering a place of prayer and burial to the faithful. Today, it is a remarkable example of Poitevin Romanesque heritage, mixing local history and distant influences.

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