Chan Chan

Chan Chan is the ruined capital of the Chimú, a people who built a powerful kingdom along the desert coast of northern Peru. It stands near the mouth of the Moche Valley, about five kilometres west of the modern city of Trujillo and close to the Pacific shore. Begun around 850 CE and built almost entirely of mud brick, it is often called the biggest adobe city in the Americas, and its walled palace compounds remain among the most striking monuments of the pre-Columbian Andes.

The coast here receives almost no rain, so the city depended on water brought down from the Andes by rivers. At first its people drew on wells roughly fifteen metres deep; later they dug long canals from the Moche River that opened up more farmland and allowed the settlement to grow. A great flood around 1100 destroyed many of the northern canals, and the Chimú are thought to have turned increasingly to resources obtained from outside the valley rather than to local farming alone.

As the capital of Chimor, the kingdom that developed from the Chimú culture after about 900, Chan Chan was the centre of a state that expanded by conquest along the coast. Estimates put its population at between 40,000 and 60,000. The whole city spread over some twenty square kilometres, with a dense core of about six.

At the heart of the city stood ten large walled compounds, known in Spanish as ciudadelas. Each enclosed plazas, storerooms, ceremonial rooms, reservoirs and burial platforms, and their scale points to a royal purpose; one common interpretation is that each belonged to a separate ruler, which would suggest ten rulers. The walls were thick at the base and narrowed towards the top, a shape that may have helped them survive earthquakes, and most compounds had a single entrance. Their smooth adobe surfaces were carved with fish, birds, waves, nets and small sea mammals, reflecting the importance of the ocean to Chimú belief and diet.

Society was sharply ranked. The elite lived inside the compounds, while craftspeople, who produced the textiles, pottery and metalwork for which the Chimú were known, lived and worked in clusters of small, irregular rooms. The language of the city is believed to have been Quingnam, which later died out almost without record. The origin and meaning of the name Chan Chan itself are still disputed by linguists.

Around 1470 the Inca Empire defeated the Chimú and absorbed their kingdom. Accounts of the conquest hold that the Inca gained an advantage by cutting the canals that fed the city's fields. They also resettled many Chimú people in other conquered lands, a policy of forced relocation, and Chan Chan declined rapidly.

In 1535 Francisco Pizarro founded the Spanish town of Trujillo nearby, and the old capital fell further into neglect. Its reputation for wealth survived, however, and Spanish colonists plundered its tombs. One sixteenth-century record lists treasure from a single burial worth about 80,000 pesos of gold.

Systematic excavation began in 1969 under the archaeologists Michael Moseley and Carol J. Mackey, and Peruvian heritage authorities have continued the work since. In 1986 UNESCO inscribed Chan Chan on the World Heritage List and simultaneously added it to the List of World Heritage in Danger, where it has remained ever since.

Mud brick is highly vulnerable. Heavy rains linked to El Niño erode the bases of walls, and the damp that follows brings salt damage and plant growth. A conservation and management master plan, approved by the Peruvian government in 1998, combined traditional and modern methods to stabilise key buildings, especially the compound known as the Tschudi Palace. Protective roofs, new drainage and drone-based surveys have since been used to document and shield the site. Looting and vandalism remain threats, and new finds continue: in 2026 archaeologists reported a Chimú mausoleum holding the remains of more than thirty people in one of the compounds.