Palace of Eternal Longevity built
1420 CE.
Shown on the map at 39.921°, 116.398°.
The Palace of Eternal Longevity (simplified Chinese: 永寿宫; traditional Chinese: 永壽宮; pinyin: Yŏngshòugōng), also known as Yongshou Palace, is one of the Six Western Palaces in the inner court of the Forbidden City. It is the closest residence to the Hall of Mental Cultivation, the living quarters of the Qing emperors since 1722.
Text from the Wikipedia article Palace of Eternal Longevity, licensed CC BY-SA 4.0.