Château de Breteuil is built on a promontory overlooking the Chevreuse Valley. For most of its existence, the castle has been known as Bévilliers -from latin bis villae (two villas)- which implies that this property would date back to the gallo-roman period.
The first estate appears in History as early as 1066 with Guillaume Osbern, the first Breteuil, who was Seneschal to the Duke of Normandy. Guillaume Osbern took part in the conquest of England by William the Conqueror, who saw him as his most faithful companion. In the summer of 1067 the King returned to Normandy, leaving the Lord of Breteuil and his brother in charge of England in his absence.
At the time, a fortified castle was built in Bévilliers; its dovecote and moats still remain today. In 1596, Thibaut Desportes bought the estate still called Bévilliers. Bordered by medieval square moats, a new castle was laid out around an enclosed courtyard, A pleasure garden was carefully thought out, situated at the foot of the north facade, so that the sun never glares into the eyes of the person contemplating it.
The curtain walls were removed and moat dried in 1820-1830. The major restoration took place in the end of the 19th century: two wings were added and the gardens were extended.
References:The first written record of church in Danmark locality date back to the year 1291. Close to the church are several stones with a Christian text and cross inscribed. The oldest parts of the present red-brick church are from the 1300s. In the late 1400s the church was enlarged to the appearance it has today. The church has been modified both internally and externally several times, among other things after the fires in 1699 and 1889. There are lot of well-preserved mural paintings in the walls.