The Hall of Supreme Harmony is a palace located in the Citadel area of the Citadel of Hue, where the coronation of 13 Nguyen emperors took place, from Gia Long to Bao Dai. In feudal time, this palace is considered the center of the country. It can be seen that the name of Thai Hoa Palace as a criterion, a wish of the Nguyen emperors to have a prosperous and peaceful emperordom. According to the researchers, the word "Thai Hoa" in the name "Thai Hoa Hall" has a deep philosophical meaning. The word "Thai" is great and big, the word "Hoa" implies harmony, which can be expressed as a life harmonizing yin and yang, strength and meekness, people and people, people and Sky, people and Earth.