Every great city is entirely itself and nowhere else. At the same time, they're all like ... somewhere. Somewhere that doesn't exist. A Platonic copy, perhaps; an embodiment of the idea of the city, whatever that may be. Morocco has several versions – all different – but in the end Tangier, Rabat and Marrakesh seem to me just rehearsals for the world's great masterpiece, Fez. In particular, the Bali Medina, the walled Old City, of Fez. The traditional Great City – traditional now, in our post-...