Fes is the city that refuses to simplify itself. Founded in 789 CE, it is the oldest of Morocco's four imperial cities and the one that has changed least in its essential character. The medina of Fes el-Bali — the old city — is the world's largest car-free urban area: nine thousand alleys, none of them going quite where you expect.
The University of al-Qarawiyyin, founded in 859 CE, is the oldest continuously operating university in the world. The tanneries of the Chouara quarter have worked leather using cedar bark, saffron, and pigeon guano since the eleventh century. The Bou Inania Madrasa, the Nejjarine fountain, the bronze doors of the Kairaouine mosque — Fes accumulates evidence of what a medieval Islamic city at the height of its civilisation looked like.
The new city, Fes el-Jedid, sits adjacent — built in the thirteenth century, now home to the Mellah, the old Jewish quarter with its distinctive balconied houses and the Danan synagogue still in use. Beyond it, the Ville Nouvelle, the French colonial city, with its wide boulevards and patisseries.
Fes rewards patience and a willingness to get comprehensively lost. A guide is not a concession — it is the only way to understand what you are looking at. The city has been teaching that lesson for twelve hundred years.