Coordinates: 29°07′00.68″N 58°22′06.51″E / 29.1168556°N 58.3684750°E
The Arg-e Bam (Persian: ارگ بم) was the largest adobe building in the world, located in Bam, a city in Kerman Province of southeastern Iran. It is listed by UNESCO as part of the World Heritage Site "Bam and its Cultural Landscape". The origin of this enormous citadel on the Silk Road can be traced back to the Achaemenid Empire (sixth to fourth centuries BC) and even beyond. The heyday of the citadel was from the seventh to eleventh centuries, being at the crossroads of important trade routes and known for the production of silk and cotton garments.
The entire building was a large fortress containing the citadel, but because of the impressive look of the citadel, which forms the highest point, the entire fortress is named the Bam Citadel.
On December 26, 2003, the Citadel was almost completely destroyed by an earthquake, along with much of the rest of Bam and its environs. A few days after the earthquake, the President of Iran, Mohammad Khatami, announced that the Citadel would be rebuilt.
Larger than nearby Rayen Castle, the area of Bam Citadel is approximately 180,000 square meters (44 acres), and it is surrounded by gigantic walls 6–7 metres (20–23 ft) high and 1,815 metres (5,955 ft) long. The citadel features two of the "stay-awake towers" for which Bam is famed - there are as many as 67 such towers scattered across the ancient city of Bam.