Arg-é Bam is a remarkable fortified mediaeval city founded in the Sassanian era (3rd-7th centuries AD) - although the original foundations are said to extend back 2000 years - with later additions made during the time of the Safavids (15th century on). It is built entirely of mud brick. The city was a great textile center in the Middle Ages, and you may wander through the deserted streets with its remains of bazaars, houses, shops and mosques, continuing up to the Citadel which towers over the city. There is a pleasant teahouse on site.
