The largest Pre-Columbian city in South America built in adobe by the Chimu kingdom, five km west of Trujillo. Chan Chan covers an area of approximately 20 km² and had a dense urban center of about 6km². Chan Chan was constructed by the Chimor (the kingdom of the Chimú), at late intermediate period civilization which grew out of the remnants of the Moche civilization. The vast adobe city of Chan Chan was built around AD 850 and lasted until its conquest by the Inca Empire in AD 1470. It was the imperial capital of the Chimor. It is estimated that around 30,000 people lived in this city. It was added as a UNESCO World Heritage Site in 1986.