The ancient citadel of Bam (Kerman Province, south-east of Iran) enjoys plenty of architectural and urban design features; covering a 200,000-square-meter area, it manifests as one of the magnificent mud-brick complexes of the world, and encompasses various types of historical buildings and residential places, linked and mingled with one another based on a unique pattern on the slope of a hill, and leading, finally, to the exceptionally majestic Chāhār-fasl (roughly, “four-season”) building on top, toward the peak. The sites, also, enjoys the existence of various residential layers of a two-thousand-year period, and this feature adds to its archaeological values. Following the devastating earthquake in the area, the ancient citadel, a major part of the World Heritage Property was transferred, in 2004, to the Endangered World Heritage List of UNESCO.