The Tan-Tan Moussem is an annual gathering held since 1963 by more than thirty tribes from southern Morocco and other parts of Northwest Africa in Tan-Tan, a town in south-western Morocco. In traditional Berber culture, a moussem is "a type of annual fair with economic, cultural and social functions." Nomadic tribes travel to the moussem from all over the Sahara, making it the largest gathering of nomadic tribes in northern Africa. Around 800 tents are set up to accommodate them, with some used for special exhibits on traditional Berber tribal life.