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Origin and history

The Commanderie d'Omerville, also known as commanderie de Louvières or Louviers-Vaumion, is a former commanderie hospitalière located in Val-d'Oise, Île-de-France. Founded in 1181 by Gaudefroy d'Ambleville, who offered the Hospitallers the house of the Vaumion (farm, church and land), it extended in 1212 with the acquisition of the domains of Louvières and Gerville, validated by Philippe-Auguste. These properties, although managed by the Hospitallers, did not yet form an official command office at that time.

In 1312, after the council of Vienna and the dissolution of the Order of the Temple, the Templar Commandory of Villedieu-les-Maurepas (Élancourt) was attached to the domain of Louviers-Vaumion. Appeared by the Hundred Years War, the latter was integrated in 1474 at the Saint-Jean-de-Latran Hospital in Paris. It was only in 1633, during a reorganization of hospital possessions, that Louviers-Vaumion became a fully-fledged command office, bringing together property from Cernay, Villedieu-les-Maurepas and Bellay-en-Thelle.

Until the Revolution, forty-two commanders succeeded at his head. Sold as a national property in 1791, only remains today: vaulted caves with warheads, walls and a tower, inscribed in historic monuments in 1926. Louvières' farm, the capital of the estate, marked the landscape between Omerville and Ambleville, along Magny's Aubette.

A monumental cross called "cheese cross", located on the Place d'Omerville, is often associated with the commandery. Although its symbol (the croix patée circled) evokes the Templars — especially the abacus, the command stick of the masters of order — no direct evidence binds this cross to the Hospitallers. Its origin could go back to Villedieu's Templar Commandery, whose territorial boundaries had similar patterns.

The site illustrates the evolution of military religious orders in Île-de-France, moving from Templars to Hospitallers, then to post-revolutionary secular management. The architectural remains and the cross testify to its historical importance, between spiritual power, agricultural management and territorial marker.

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