The Weiyang Palace was the main imperial palace complex of the Han dynasty and numerous other Chinese dynasties, located in the city of Chang'an. It was built in 200 BC at the request of the Emperor Gaozu of Han, under the supervision of his prime minister Xiao He. It served as the administrative centre and imperial residence of the Western Han, the Xin dynasty, the Eastern Han, the Western Jin, the Han-Zhao, the Former Qin, the Later Qin, the Western Wei, the Northern Zhou, and the early Sui dynasty.