Winter resort in W Switzerland on Lake Geneva; population (1980) 21,000. It is the site of the island rock fortress of Chillon, where Francois Bonivard (commemorated by the poet Byron), prior of the Abbey of St Victor, was imprisoned 1530-36 for his opposition to the Duke of Savoy. At the annual television festival (first held 1961), the premier award is the Golden Rose of Montreux.