Excavations carried out from the end of the 19th century, in particular by the archeologist Albert Naef (1862-1936), affirm that this site has been occupied since the Bronze Age.
In its current state, the Castle of Chillon is the result of several centuries of constant building, adaptations, renovations and restorations.
The rocky island on which the castle is built, was both a natural protection and a strategic location to control the passage between northern and southern Europe.
