Château de Beaumont-sur-Oise

About

Beaumont-sur-Oise Castle is a former castle, today ruined, whose remains stand on the French commune of Beaumont-sur-Oise in the Val-d'Oise department, in the Île-de-France region. The archaeological site of the castle is classified as historical monuments.

Location: The castle is built on a corner of wooded plateau overlooking the left bank of the Oise, on the commune of Beaumont-sur-Oise, in the French department of Val-d'Oise. It was built on the plateau, dug to the north by a dry valley, in the enfilade of a bridge whose origin must be very old, crossing the river, between Creil and Pontoise, on the road from Paris to Beauvais.

History: This former castle was one of the most important in the Oise Valley. Mentioned for the first time in 953 by Yves "the old one" at Pecq, it is then a wooden castle built on motte around the third century[ref. necessary]. On this rocky spur, it controls the passage from the Oise to Paris. It had a rectangular Romanesque dungeon with flat buttresses of twenty-five meters high and five wide. The stone dungeon was probably erected in the 12th century by the...