It seems to be a town in the Pyrenees. But it's hard to find out much about it, because most of the sites that Google throws up refer to some kind of a strange board game.
I had a bad fever and sore throat so I rubbed Caylus on my forehead and the next day I was better. Amazazed, I gave the box to my neighbor who slept with it. The next moring he told me his impotence was cured.