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Origin and history

The Glaignes Castle, although little documented in the available sources, is associated with a major archaeological discovery: the Cave of the Dead, a prehistoric burial discovered around 1845 in its park. This cave, dug in the tuff under a plateau between the valleys of Glaignes and Bailleval, housed about 40 skeletons, bone fragments (including perforated humerus and flattened tibias), as well as pieces of pottery and flint. These remains, studied and published in 1871 by Virgile Calland in his Notice on a Prehistoric Burial, testify to an ancient occupation of the site, long before the medieval or modern period.

The town of Glaignes, where the castle stands, is marked by a rich natural and historical heritage. Crossed by the Sainte-Marie River (a tributary of the Autumn), it is part of a landscape of forested valleys and agricultural plateaus, typical of Valois in Oise. The village, of Gaulish origin (its name would come from glanna, "berge", or glennos, "valley"), also preserves a 13th century early Gothic church, classified as a historical monument, which dominates the houses. The castle, although not detailed in the sources, seems to have played a role in preserving this heritage, as evidenced by the excavations of the nineteenth century.

In the 19th century, the region was a home of archaeological studies, carried out by local scholars such as Virgile Calland. The discovery of the Cave of the Dead, with its skeletons and artifacts, suggests a neolithic or protohistoric occupation, although the remains were scattered after their exhumation. The castle, probably a seigneurial residence or agricultural estate at that time, would have housed this cave in its park, on the sides of an abrupt hill. Today, Glaignes remains a rural village of 356 inhabitants (2023), marked by its prehistoric and medieval history, between natural heritage and ancient human traces.

The castle site is also linked to the local geological and hydrological history. The Sainte-Marie valley, framed by limestone plateaus, has favoured the formation of caves like the Dead, dug in the tuff. This geomorphological context, combined with the proximity of the Autumn and its tributaries, has attracted populations from prehistoric times. The 19th century excavations, though partial, revealed collective funeral practices, possibly linked to a ritual site or temporary habitat. These elements make the Glaignes Castle an emblematic place of the region's long memory.

In the absence of sources detailing the architecture or medieval history of the castle, its interest lies mainly in its basement and its environment. The commune, integrated into the community of communes of the Pays de Valois, is today based on its natural heritage (forests, rivers) and cultural (church, local theatre) to boost its territory. The castle, although not open to the public or described as a visitable monument, remains a symbol of the historical strata of Glaignes, from prehistoric times to contemporary times.

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