During my first trip to Morocco — many years ago now — I discovered the Gnawas. They were in the streets and squares of some cities. To see these groups singing is fascinating. It is a community that is spread all over the Maghreb. They are strongly established in Morocco, where they are in Marrakech, Essaouira and Fez. The Gnawas have posed many questions to anthropologists over the past 50 years. Their music associated with their rituals would have common origins with voodoo, Cuban Santeria and Brazilian Candomblé, which had to be transformed and adopted by Islam in order to survive.