Shenyang Imperial palace is an excellently well-preserved cultural relic. In 1625 Nurhaci began construction on the palace and it was completed in 1636 under Abahai's reign. This palace is the second only to the Forbidden City in the extent of its preservation in Beijing. The Manchurian influence behind its construction also shows a vast departure in style from its predecessor. The main architecture on the central axis is the Chong Zheng Dian, where Abahai attended to his political affairs. It is also the hall where Juchen was renamed Manchu. Behind is the three towers Feng Huang Lou (Phoenix Tower), and Qing Ning Gong (Palace of Celestial Peace) in which Abahai and his concubines lived. Da Zheng Dian (Hall of Great Affairs) is the mail architecture on the east axis. There are eight pavilions in front of the hall, and the Manchurian tribal lords used it to gather for discussion of state affairs and other important ceremonies.