Situated in the Haidian District northwest of Beijing, the Summer Palace is a Unesco World Heritage site that used to be the palace and garden of the emperors of the Qing Dynasty. It is the largest and most well preserved royal park in China. Construction of the palace began in 1750 and it served as a residential and entertainment area for the royal members. The palace underwent two major reconstructions after suffering damages during invasions by the Anglo-French Allied Forces and the Eight-Power Allied Forces during the late 19th and early 20th centuries. The Summer Palace can be divided into three sectors: a political activity area centered at the Hall of Benevolence and Longevity; an empress living area concentrated around the Hall of Jade Billows and Hall of Joy and Longevity; and a tour route concentrated along the long corridor, rear hill, and the west sector.