Introduction to Gwangmyeong Gate: It was originally the main entrance of Xiannyeong Palace. It was moved to the southwest in 1938 and became a place to display the Heungcheon Death Bell and Changgyeonggung Pavilion. Originally located in Changgyeonggung Palace, the automatic water clock was the national standard clock in the Joseon Dynasty. At each moment, the zodiac sign comes out to tell the time. It is a Korean national treasure (No. 229).