Foundation of the Hotel-Dieu fin XIe - début XIIe siècle (≈ 1225)
Created by Robert du Puy on the return of the Holy Land.
XIIe siècle
Construction of the octagonal chapel
Construction of the octagonal chapel XIIe siècle (≈ 1250)
Ranked historic monument in 1840.
1584
Collapse of coverage
Collapse of coverage 1584 (≈ 1584)
Chapel ruined before renovation.
1611-1639
Restoration of the chapel
Restoration of the chapel 1611-1639 (≈ 1625)
Pyramidal carpent and dome bell tower added.
1840, 1930, 1984-1985
Historical monuments
Historical monuments 1840, 1930, 1984-1985 (≈ 1913)
Progressive protection of buildings and decorations.
1997-1999
Modern restoration
Modern restoration 1997-1999 (≈ 1998)
Back to 17th century appearance.
Aujourd'hui
Aujourd'hui
Aujourd'hui Aujourd'hui (≈ 2025)
Position de référence.
Heritage classified
Octogonal Chapel: List by 1840 - Chapelle Saint-Laurent (excluding classified parts): inscription by order of 3 December 1930 - Porche d'entrée; Heater; fortified house of the Prior; facades and roofs, monumental staircase and three rooms (large living room, small living room and bedroom) with their decor, buildings built in the 17th century by the Augustins; tithe barn; the two small pavilions of the vegetable terrace; painted interior decoration of the 19th century of the chapel Saint-Laurent as well as the western facade and the bell tower (Box AE 507): classification by decree of 5 December 1984, modified by decree of 30 October 1985 - Façades and roofs of the three wings of the 19th century (Box AE 507): inscription by decree of 5 December 1984
Key figures
Robert du Puy - Founder of the Hôtel-Dieu
Created the House of God around 1080-1085.
Saint Amboise - Symbolic inspiration
Link number 8 to Resurrection.
Origin and history
The Hôtel-Dieu de Montmorillon, founded around 1080-1085 by Robert du Puy on his return from the Holy Land, houses a 12th century Roman octagonal chapel, classified in 1840. This citerial chapel, built on an ossuary, may be inspired by the Holy Sepulchre of Jerusalem or other European octagonal models such as Aachen. His plan symbolizes the Resurrection, with the number 8 evoking eternity according to Saint Amboise. A second smaller octagon, called a heater, completes the whole in the enclosure of the House-God.
The chapel, ruined in 1584, was renovated between 1611 and 1639 with a pyramidal frame and a dome bell tower, destroyed in 1724. The restorations of 1997-1999 restored its 17th-century appearance, including a campanile lantern. Its sculpted decor includes 69 modillons (monsters, human heads) and caps decorated with grimaçant faces or lions. The facade features religious scenes such as the Annunciation or the four evangelists.
The Octogone is part of a rare architectural tradition of octagonal ceramic chapels, linked to the Christian symbolism of eternal life. Comparable examples exist in France (Laon, Le Puy-en-Velay) and Europe (Spain, Portugal). Although assumptions suggest a sacralization of the site from the Gallo-Roman era, no archaeological excavation has confirmed these theories. The Hôtel-Dieu, with its 17th-century buildings (prioral logis, tithe barn) and its chapel Saint-Laurent, remains a major testimony of the poitevin hospital and religious heritage.
Ranked a historic monument for its octagonal chapel (1840), its porch, its heating room and its interior decorations (1930-1985), the site now belongs to a public establishment. Its official address, 4 rue des Augustins in Montmorillon (Vienne), makes it an accessible historic place in New Aquitaine, mixing medieval history and Augustinian heritage.
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