Timeline

Heritage classified

Key figures

Origin and history

The castle of the Mormaire, located in Grosrouvre in the Yvelines, finds its origins in a local topography marked by an expanse of stagnant water, as evidenced by its first mentions: Mortuo-Mari in 1142 or Mormère in 1635. Its name, derived from the Latin Mortum mare ("dead sea"), evokes a large marsh, a characteristic shared with the Abbey of Mortemer in Oise. These ancient references highlight the medieval anchoring of the site, long before its reconstruction in the seventeenth century.

The reconstruction of the present castle is attributed to Laurent Regnard, adviser and secretary to King Henry III, who acquired the fief in 1582. He gradually expanded his estate by integrating the lands of La Mandreux (1606) and La Noue (1612). The castle then passed into the hands of his descendants, such as Charles Regnard (lawyer to Parliament in 1635) or Jacques Regnard, before being ceded to noble families such as the Chennevières (king's advisers) in the 17th century.

In the 18th century, the seigneury changed hands several times: sold in 1748 by the widow of P.-François de Moncrif, it was bought in 1762 by Claude Nicolas Peteau, Musketeer anobli under Louis XV. His family, the Petau de Maulette, then owned several regional castles and made a lasting mark of local history, as evidenced by a street of Montfort-l-I'Amaury bearing their name. The castle then knew illustrious owners, such as the industrial Hippolyte Auguste Marinoni or the financier Robert Cottin, before being acquired by the businessman François Pinault.

Ranked a historic monument in 1990, the 17th century castle and its park renovated at the end of the 20th century illustrate the evolution of a seigneurial estate in private residence. Protected features include facades, roofs, outbuildings (off-farm) and the walled park, reflecting both its architectural heritage and its contemporary adaptation.

The place's toponymy, as well as its history, reveals a social stratification typical of Ile-de-France: from royal lords to anobli families, industrialists and financiers. This castle, now closed to the public, embodies almost five centuries of economic and cultural transformation in the Yvelines.

External links