Built in 1522, the castle of the bull is a defensive fortification. It was upgraded by Vauban in 1700. The work took about 45 years. The castle of the bull has never been a major military role. It has been used as a prison for a long time. In 1914 he was classified a historical monument. This does not prevent the Germans using it as DCA during the Second World War. After the war, the sailing school Morlaix settles for 20 years. Then in 1980, it is abandoned. Fishermen love to come and make a fire to eat but they ransacked the wood fittings. Today it is finally restored and visited by the public.

The fort Roppe is also called Fort Ney. It was built between 1875 and 1877. It is part of the fortifications in eastern France. It is a strong type Sere River. It was modernized during the 1914-1918 war.

In 1870, France is partly occupied by Prussian armies. Following this defeat, it sets up the Sere de Rivières system that allows for the construction of fortifications to defend Paris. It is in this context that the High Fort Buc was built. Work began in August 1874 and ended in 1880.

The Fort High Buc is part of an ensemble of two forts, Fort Villeras located in Saclay and Fort High Buc, and smaller peripheral structures.

From 1979 to 1995, the arms company Thomson amends hard to build a missile factory. The book is sometimes used by the national police, to conduct trainings in combat.

In 2010, the city has opened a contest for best restoration project site.