The Summer Palace or Yihe Garden (simplified Chinese: 颐和园; traditional Chinese: 頤和園; pinyin: Yíhéyuán) was built by the Chinese Empress Cixi as a pavilion for quiet retreat. It is a vast ensemble of lakes, gardens and palaces in Beijing. An imperial garden during the Qing dynasty, it includes Longevity Hill (万寿山; 萬壽山; Wànshòu Shān), Kunming Lake, and Seventeen Hole Bridge. It covers an expanse of 2.9 square kilometres (1.1 sq mi), three-quarters of which is water.
Longevity Hill is about 60 metres (200 ft) high and has many buildings positioned in sequence. The front hill is the site of splendid halls and pavilions, while the back hill, in sharp contrast, is quiet with natural beauty. The central Kunming Lake, covering 2.2 square kilometres (540 acres), was entirely man-made and the excavated soil was used to build Longevity Hill.