Which dynasty's imperial palace was located in the city that includes the Hall of Union?
Ming dynasty
Title: Suzaku Avenue
Passage: Suzaku Avenue or Suzaku Boulevard (朱雀大路 , Suzaku Ōji ) is the name given to the central avenue leading to the Imperial Palace from the south in Japanese capitals.  Traditionally the Imperial palace complex faces south, whilst Suzaku Avenue leads directly away from the main gate.  Cities were often based on a traditional Chinese grid pattern.  Suzaku Avenue was typically the central road within the city grid, and as a result, the widest.  Fujiwara-kyō, Heijō-kyō, and Heian-kyō had their own Suzaku Avenue.
Title: Forbidden City
Passage: The Forbidden City was the Chinese imperial palace from the Ming dynasty to the end of the Qing dynasty—the years 1420 to 1912.  It is in the center of Beijing, China, and now houses the Palace Museum.  It served as the home of emperors and their households as well as the ceremonial and political center of Chinese government for almost 500 years.
Title: Hall of Union
Passage: The Hall of Union () 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.
Hall of Union Forbidden City