Broyon Castle, locally known as Château de Broyon or Tour de Bucy-le-Long, lies in the village of Bucy-le-Long, east of the city of Soissons in the Aisne department in the Picardy region in France.
Broyon Castle dates back to the 15th century. It was built by a Guillaume de Bisch. It was oblong in shape and enclosed a court.
In the 18th century the remains of the castle were turned into farm. A later owner, called Charles Binet, demolished everything except the present tower.
The tower is D-shaped and some 20 meters high. There are no rooms inside but a spiral staircase which led to the seperate floors of the now dissappeared adjoining building.
The tower is private property and can not be visited but can easily be seen from the public road.