Hall of Union
交泰殿
The Hall of Union
Alternative names	Jiāo Tài Diàn
General information
Type	Hall
Location	Forbidden City
Town or city	Beijing
Country	China
Coordinates	39°55′8.7″N 116°23′25.8″E / 39.919083°N 116.390500°E / 39.919083; 116.390500

The Hall of Union (Chinese: 交泰殿; pinyin: Jiāo Tài Diàn; Manchu: ᡤᡳᠶᠣᠣ
ᡨᠠᡳ
ᡩᡳᠶᠠᠨ giyoo tai diyan) is a building in the Forbidden City, in Beijing, China. It stands between the Palace of Heavenly Purity and the Palace of Earthly Tranquility. These three halls together constitute the centre of the Inner Court of the palace complex.

The hall is square in shape with a pyramidal roof. Stored here are the 25 Imperial Seals of the Qing dynasty, as well as other ceremonial items, including the clocks that set the official time in the palace (first a water clock, later a mechanical clock, both still displayed in the hall.^{[citation needed]}