The Hassan Tower is considered as the symbol of Rabat, it is one of the most famous sites of the kingdom. The Hassan tower remains the only vestige of what was to be, at the instigation of the Almohad sultan Yacoub Al Mansour (12th century), the largest mosque in the Muslim world. This oversized project was not going to survive, at the death of the latter, in the year 1199, nor later, the earthquake of Lisbon in 1755. Only his minaret 44 meters high, very close architecture Koutoubia de Marrakech and the Giralda of Seville survive and give its name to the monument: Hassan Tower.