Casablanca, a young and dynamic city, concentrates nearly 60% of the country's economic activities. With nearly 4 million inhabitants, Casa is the largest city in the Maghreb and the 4th largest in Africa. It is totally oriented towards business and evokes the great Western metropolises. The city center is not very touristy (wrongly), it contains some wonders: buildings dating from the 1930s or the old medina and its narrow alleys. The Hassan-II mosque is the largest in the Maghreb and one of the most beautiful by the exaggeration and luxury that characterize it.