Other large adobe structures are the Huaca del Sol in Peru, with 100 million signed bricks, the ciudellas of Chan Chan and Tambo Colorado, both in Peru (in South America).

Huaca del Sol in Peru

The entire building was a large fortress in whose heart the citadel itself was located, 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 Iranian President Mohammad Khatami announced that the Citadel would be rebuilt.

The Arg-e Bam (Persian: ارگ بم‎) was the largest adobe building in the world, located in Bam, a city in the Kermān 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 period (6th to 4th centuries BC) and even beyond. The heyday of the citadel was from the 7th to 11th centuries, being at the crossroads of important trade routes and known for the production of silk and cotton garments.[1]

The Largest Structure ever made from Adobe 

Earliest known Adobe Brick

British Museum EA 6020.
19th dynasty, reign of Ramesses II (1279-1213 BC).
From the Ramesseum, Thebes.
Mud bricks were used for the walls and storerooms surrounding Egyptian temples. Some were stamped with the name of the king responsible for the construction. This mud brick is stamped (on top) with the cartouche of Ramesses II.


Adobe Brick

Adobe is basically soil, water and sometimes added fiber such as straw. The soil will have a combination of sand or other aggregate and 15 to 30 percent clay. Other possible additives include cement or asphalt, especially in zones of more extreme weather. Pouring the mixture into molds that are then allowed to dry, or cure, into the bricks forms the blocks. 

The San Tan Adobe Company