As the sky slowly changes from the deep dark blue to the faint purple, and the more and more pink, the layers of clouds suddenly become bright, this experience is magical and exciting, look forward, Djemaael-Fna Square The southwestern part is the most famous monumental building, the Koutoubla Mosque. It is 70 meters high and can be seen in all directions from a few miles away. It was built by the Sultan Jacoby Mansour (1844-1199) of the Almuwadid Dynasty, formerly the site of the 11th-century Almuwahid dynasty mosque, whose light tower is the world. The oldest and best preserved of the three most famous light towers, the other two are: Hassan Tower in Rabat and the Girada Light Tower in Seville, Spain. There used to be a book market here, and now only Koutoubia (from Koutoubia or Kutub, the Arabic word for "book") is left.