I go to the Chang-deok palace. The maninig gate, Don-hwa-mun was built in 1412. It is the oldest remaining gate among the 5 palace gates in Seoul. It is in the style of a two story pavilion, making it the largest palace gate. I surprise about it. There was a  nine ton bell was hung huge drum  on the second floor of the gate. First, the drum was struck 33 times at 4am, this meant people could go around the city and then, at 10pm the bell was rung 28 times, this was in expectance of a peaceful night. I thougth the Jo-seon people was very, very wise people and Jo-seon people thougth about nature. I love this palace very much.