The Xiadu or Lower Capital of Yan () was one of the capitals of

Yan Yan may refer to: Chinese states * Yan (state) (11th century – 222 BC), a major state in northern China during the Zhou dynasty * Yan (Han dynasty kingdom), first appearing in 206 BC * Yan (Three Kingdoms kingdom), officially claimed indepe ...

during the

Warring States period The Warring States period () was an era in ancient Chinese history characterized by warfare, as well as bureaucratic and military reforms and consolidation. It followed the Spring and Autumn period and concluded with the Qin wars of conquest ...

of ancient China. Xiadu may have been the largest city in the world from 400 to 300 BC, with an estimated peak population over 300,000. The remains of the city are located in Yi County,

Baoding Baoding (), formerly known as Baozhou and Qingyuan, is a prefecture-level city in central Hebei province, approximately southwest of Beijing. As of the 2010 census, Baoding City had 11,194,382 inhabitants out of which 2,176,857 lived in the b ...

Hebei Hebei or , (; alternately Hopeh) is a northern province of China. Hebei is China's sixth most populous province, with over 75 million people. Shijiazhuang is the capital city. The province is 96% Han Chinese, 3% Manchu, 0.8% Hui, and 0 ...

Province. At 30 km², Xiadu is the largest excavated city from the Warring States period. Xiadu was surrounded by a moat and

rammed earth Rammed earth is a technique for constructing foundations, floors, and walls using compacted natural raw materials such as earth, chalk, lime, or gravel. It is an ancient method that has been revived recently as a sustainable building method. ...

wall; the base of the city walls measured 40 m at its widest. A portion of the old city wall, measuring up to 6.8 m high, still remains today. The ruins were first excavated in 1929 by an archaeological expedition from Peking University. The city was built in the

Taihang Mountains The Taihang Mountains () are a Chinese mountain range running down the eastern edge of the Loess Plateau in Shanxi, Henan and Hebei provinces. The range extends over from north to south and has an average elevation of . The principal peak is ...

, flanked by the Beiyi River to its north and by the Zhongyi River to its south. The difficult topography made it easy to defend from attack. The city was square, with a wall and

canal Canals or artificial waterways are waterways or engineered channels built for drainage management (e.g. flood control and irrigation) or for conveyancing water transport vehicles (e.g. water taxi). They carry free, calm surface flo ...

running north–south through its center, dividing the city into eastern and western halves. Large workshops for casting iron, casting bronze, minting coins, making weapons, making pottery and making bone objects were all found in the eastern city. The palace and royal cemeteries were also located in the eastern city. Two cemeteries were discovered; 13 and 10 tombs were found in each. All the tombs were covered by a pyramidal

tumulus A tumulus (plural tumuli) is a mound of earth and stones raised over a grave or graves. Tumuli are also known as barrows, burial mounds or ''kurgans'', and may be found throughout much of the world. A cairn, which is a mound of stones bu ...

. A museum about the discovered objects was built in Beijing.西周燕都遗址博物馆
/ref>

References

* Allan, Sarah (ed), ''The Formation of Chinese Civilization: An Archaeological Perspective'', {{ISBN, 0-300-09382-9 Archaeological sites in China Ancient Chinese capitals Major National Historical and Cultural Sites in Hebei Yan (state) Baoding