First Courtyard
The first courtyard was the focal point for castle services. Originally, it was not as large as it is now; the current layout was established after an earthquake in 1584.
Second Courtyard
The passageway between the first and the second courtyards was originally much narrower. It was widened in 1836 to fit canons through. In the Middle Ages the castle administrator, a Savoy officer known as the castellan or constable, lived in the buildings surrounding the courtyard. The keep, built in the middle of the castle in the 11th century, is the oldest building still standing at Chillon.
Third Courtyard
The third courtyard, known as the ‘Courtyard of Honour’, was overlooked by the Savoy family’s private apartments.
Fourth Courtyard
Finally, the fourth courtyard, known as the ‘Curtain-wall Courtyard’, was entirely designed to defend and control the old road: thick walls, narrow openings (arrow-loops and loopholes, for example) and defensive architecture such as hoardings, machicolations and the glacis (or defensive apron slope).
Today, these areas are regularly used for performances and events.