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Heritage classified

Origin and history

The Abbey of Montcient, located in Sailly in the Yvelines, is a religious building whose remains date mainly from the twelfth and thirteenth centuries. Classified as a Historical Monument, it bears witness to medieval monastic architecture in Île-de-France. Its remains, protected since 1926, are now integrated into a private domain, limiting public access.

The location of the abbey, although documented (5091 Domaine de Montcient, 78440 Sailly), remains approximate according to available sources, with geographical accuracy assessed as satisfactory a priori. The site, owned by a private company, raises questions about its current use (visits, events, accommodation), not specified in the archives consulted.

The protected elements are limited to the remains of the former Abbey, listed in the inventory of Historical Monuments by order of 4 June 1926. No information details the construction phases, associated religious communities, or subsequent transformations. Sources are limited to Monumentum data and administrative references (Insee Code 78536, Yvelines Department).

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