This, the oldest Imperial city in Morocco, has been declared a World Heritage site by UNESCO and as such is also one of the best preserved medieval cities. Dominating the heart is the Karaouiyine Mosque, one of the oldest in the western Muslim world. In the famous Chouara or Tanners Quarter the craft of traditional tanning continues today as it did in the Middle Ages, it is quite the most colourful of souks and well worth bearing the odour to take a look!