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Origin and history

The Château de l'Isle-Marie, located in Picauville in the English Channel, is a 17th century residence built near an ancient medieval fortress called the Man or Holm. This strategic site, attested as early as 1026 under the Latin name Holmus, controlled the river and land tracks at the borders of the Cotentin marshes, between the Ouve and Merderet rivers. Its name of Scandinavian origin (holmr, meaning "island") reflects its island character during winter floods. The circular enclosure of the eleventh century, still visible, bears witness to its defensive role under the Dukes of Normandy, such as Richard II or Robert the Magnificent.

The medieval fortress, mentioned in 996, was a major political issue: Richard III of Normandy offered as a dowry to his wife Adèle in 1026, and it served as a prison for Robert I in 1024. In the 12th century, it passed into the hands of the families of Agneaux and Aux Paules, before being involved in the conflicts of the Hundred Years War. In 1649, during the Fronde, François Goyon de Matignon took over at the expense of the Bellefonds, which transformed it into a residential estate in the 17th century.

Marshal Bernardin Gigault of Bellefonds (1630–198), owner from 1675, built a manor house for disabled soldiers and a chapel designed by Jules Hardouin-Mansart. This chapel houses the embalmed heart of his son, who died at the Battle of Steinkirk (1692). The estate, rebuilt in Gothic Revival style in 1900 by architect Drancey, preserves remains of a bastioned enclosure at the Vauban, partially destroyed in 1830. The castle, inscribed in historical monuments in 2001, also inspires literature, as in What does not die of Barbey d-Aurevilly (1884).

The present building, 100 metres from the old fortress, combines a body of rectangular houses flanked by circular towers (17th century), a dovecote, and commons. The English-speaking park, replacing old canals, includes a palm grove and classified fence walls. The excavations still reveal the 11th century circular enclosure, a deep ditch, and the traces of a medieval lowyard with a renovated chapel.

The site, strategic since the ducal era, illustrates the evolution of the Norman fortresses: from the vicus of the 10th century (cited in the charters of Richard I) to the aristocratic residence of the 17th to 20th centuries. Its history reflects the power struggles in Normandy, from Vikings to the wars of Religion, through the Fronde. Today, it bears witness to this historical stratification, between medieval remains and modern transformations.

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