Fenghao is the modern name for the historical twin cities of Fengjing and Haojing in Ancient China, on the opposite banks of the Feng River, a right bank tributary of the Wei River, about 15 km (9.3 mi) upstream of its confluence with the latter. For three centuries, the two cities served as the capitals of the Zhou state and the Western Zhou dynasty before ruined by a barbarian sacking. The archeological sites of the cities are located in modern Chang'an District of Xi'an, Shaanxi province.