A series of gates surrounds the two centers of ancient, medieval Fez (sometimes spelled Fes). The principal axes link the center to the gates and a street surrounds the heart of the old city. The Kairouan quarter, which is longer, is crossed by an artery. Narrow, tortuous pedestrian streets, covered passages, stairs and numerous dead-ends make up the dense layout with few urban squares. One can still see the religious and military monument reflecting the heyday of the Moorish city, and the intellectual enlightenment of the Islamic city. The twin cities have not lost their individual characters.