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Origin and history

The Château d'Oissy, located in the commune of Oissy (Somme, Hauts-de-France), was built mainly in the 18th century for François II Trudaine, a member of a family of treasurers of France. This seigneurial estate, inherited from the family of Ailly in the 16th century, was acquired in 1609 by Antoine Trudaine, then transmitted until the Revolution. The castle, rectangular in brick and stone with a sandstone base, dominated a park enhanced by a canal lined with trees, a rarity for the time when the canals were usually lined with grassy slopes.

In 1795, the estate was seized as a national property after the emigration of the Marquis de Valanglart, the last lord and great-grandson of Francis II Trudaine, and then sold. Although destroyed by fire in 1946, today the entrance gate, the walls of the ground floor, two pavilions, as well as the park and its canal, still fed by the Saint-Landon River, remain. These remains, which have been listed as historical monuments since 2001, bear witness to the Picardy Castral architecture of the 17th and 18th centuries.

The seigneury of Oissy, initially moving from the barony of Picquigny, passed into the hands of influential families such as the Picquigny (XIVth century) and the D'Ailly (XVIth century). The Trudaine family, which owned it until the Revolution, marked the domain of its administrative and architectural footprint. The castle, with its mansard floor and back wing on the courtyard side, illustrated the splendor of the seigneurial residences of the Ancien Régime, while its long, wooded perspective reflected the 18th century landscape cannons.

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