The old part of the city is surrounded with 4.5-kilometre-long (2.8-mile) thick walls, pierced by the seven historical gates, the eighth gate was added later by Muslims.
A parte antiga da cidade está rodeada por grosos muros de 4´5 quilómetros de lonxitude, horadada por sete portas históricos, a oitava porta engadíuse posteriormente polos musulmáns.