石景山区
In 106 BC, under Emperor Wu, the country was organized into 13 prefectural-provinces, or "zhou" (), and the City of Ji served as the provincial capital for Youzhou (), the territories of which extended from what is now central Hebei Province to the Korean Peninsula. The tomb of Liu Jian, the Prince of Guangyang who ruled Youzhou from 73 to 45 BC was discovered in Fengtai District in 1974 and has been preserved in the Dabaotai Western Han Dynasty Mausoleum. In 1999, another royal tomb was found in Laoshan in Shijingshan District but the prince formerly buried there has not been identified.