The Mal-Coiffée | ©Mboesch / CC-BY-SAThis is the vestige of dukes of Bourbon's old castle, raised by Louis I, extended by Louis II in the middle of the 14th century, embellished by Pierre II and his wife Anne of France (also known as Anne de Beaujeu, king Louis XI's daughter) at the end of the 15th century.
From that former fortress, only remains the keep, also known as the tour Mal-Coiffée ("Untidy tower").
In the past, it was composed of 6 storeys: each room had a chimney. From the old castle destroyed by a fire in 1755, we also can see the Renaissance detached house of Anne de Beaujeu.