First certificate of name *Mungru* 1187 (≈ 1187)
The oldest historical mention in the town.
1710
Name *Saint-Hilaire and Mongru*
Name *Saint-Hilaire and Mongru* 1710 (≈ 1710)
Toponymic evolution including Saint-Hilaire.
Aujourd'hui
Aujourd'hui
Aujourd'hui Aujourd'hui (≈ 2025)
Position de référence.
Origin and history
The Prieuré Saint-Hilaire de Montgru-Saint-Hilaire is a monument located in the commune of Montgru-Saint-Hilaire, in the department of Aisne, in the Hauts-de-France region. It is integrated into a rural area with a low population density (31 inhabitants in 2017) and a predominantly agricultural land use (78.9% in 2018), with arable land and forests. The commune, crossed by Ourcq and other rivers, has a typical landscape of the northern plains, shaped by centuries of agricultural activity and a soft topography.
The commune of Montgru-Saint-Hilaire, whose name evolves over the centuries (attested in Mungru in 1187 or Saint-Hilaire-et-Mongru in 1710), is part of a historical context marked by a persistent rurality. During the Revolution, it was briefly named after Hilaire-Montgru. The Priory, although little documented in available sources, integrates into this local setting where religious buildings often played a central role in the social and spiritual organization of small communities.
The territory, now attached to the district of Soissons and to the community of communes of the Canton of Oulchy-le-Château, preserves traces of its past through historical maps such as Cassini (18th century).
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