Yanxi Palace built
1420 CE.
Shown on the map at 39.919°, 116.392°.
The Palace of Prolonging Happiness (Chinese: 延禧宫; pinyin: Yánxǐgōng), also known as Yanxi Palace, is one of the Six Eastern Palaces in the inner court of the Forbidden City. It is situated behind the Hall for Ancestral Worship (奉先殿; Fèngxiāndiàn).
Text from the Wikipedia article Palace of Prolonging Happiness, licensed CC BY-SA 4.0.