Bab Bou Jeloud, commonly known as the 'Blue Gate,' is the grand entrance to Fes el Bali, the old medina of Fes. While the gate looks ancient, the current structure was actually built by the French colonial administration in 1913. It is famous for its Fessi zellij (mosaic tilework). A unique detail of the gate is its dual-color scheme: the exterior side, facing the world, is decorated with blue tiles (the color of Fes), while the interior side, facing the medina, is decorated with green tiles (the color of Islam). The gate is a triple-arched structure that serves as a transition point between the modern city and the car-free, labyrinthine medieval streets of one of the world's largest urban pedestrian zones.