Mosques occupy an important place in Islam. Places where group prayers are highly recommended, they are also places where the faithful can exchange ideas. However, a number of countries in French-speaking Black Africa have noted shortcomings in the way mosques are organized and run, the impact of Friday sermons on the lives of Muslims, the issue of space management, cleanliness, security and so on. This book lays bare these shortcomings and proposes solutions. It covers ten countries: Senegal, Mali, Burkina Faso, Guinea, Togo, Djibouti, Madagascar, Mauritania, Niger and Chad.