If you are a Deep Purple fan, you will know their classic 1972 hit Smoke On The Water starts with "We all came out to Montreux".
The lyrics later describe a fire in a casino in the Swiss city.
On Wednesday, the British rockers were a hot attraction at the Montreux Jazz Festival.
The event, which runs till July 14, showcases a variety of genres, with an exhibition paying tribute to rock icon David Bowie, who died in 2016.
