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Origin and history

The Church of Saint-Mamet of Peyrus-Grande is a former clunisian priory mentioned as early as 1115 in a papal bubble of Pascal II confirming the possessions of the Priory of Saint-Orens of Auch. Its existence before 1060 is suggested by sources evoking the transport of the bust of Saint Mamet to Nogaro. This priory is part of the network of roads of Santiago de Compostela organized by Cluny. Two dedicatory inscriptions, with rare characters, probably date from the Carolingian transition (late 9th–Xth century), although the choir was attributed to the last quarter of the 11th century by Marcel Durliat.

The original Romanesque architecture consisted of a bedside with three partitioned apses (choir and side chapels), a non-bending transept, and a unique nave of which only the pillars remain. The walls of the nave were demolished to create collaterals: the southern one reused the walls of the priory, while the north was rebuilt after the wars of religion (16th-17th centuries). The transept was extended by a chapel and sacristy, with major modifications in the nineteenth century: false plaster vault (1883), ovoid domes (1884), and destruction of the domes of the chapels in 1885.

The bedside, inspired orientally, presents an original plan with three separate elements (choir and chapels) vaulted in cul-de-four, reshaped awkwardly around 1850. The original windows, now blocked, suggest a more crushed apse, allowing a room above the choir. The exterior and interior decorations (interlaces, palmettes) (geometrical capitals) reveal carolingian, pre-Roman, and clunisian influences, comparable to southwestern churches such as Bougneau or Saint-Thomas-de-Conac. These stylistic similarities are explained by their connection to the order of Cluny and the mobility of craftsmen.

Ranked a Historical Monument in 1972, the church retains a reference furniture (tables, reliquary) and illustrates medieval artistic exchanges between Gascony, Languedoc and Spain. The capitals, inspired by Italian or Spanish models, broadcast in Occitanie in the 11th century, combine paleo-Christian motifs (colombes confronted) and local techniques such as gutter size. Subsequent changes (XVI–XIX centuries) reflect the liturgical adaptations and damage of religious conflicts.

Historical sources are lacking to accurately trace the origins, but architectural and epigraphic analysis can date the major phases. The studies of Marcel Durliat and Paul Deschamps highlight his role in the compostellan pilgrimage and his hybrid artistic heritage, between Carolingian traditions and novel innovations. The protection under the Historical Monuments aims to preserve this rare testimony of medieval religious art in Gascony.

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