Today I went to Seoul Museum of History. I saw some of them, but I liked Hopae, which is ID card (identity card), more than other things.

 On the front of Hopae, ID card, there are the name, class, and date of birth. Class is the level of the owner of that identity card. In the back, there is the date of issue, People who had an identity card showed that to the gate keeper before they enter the gate of the palace (castle).

 Secondly, I liked the water clock, too. The korean name of water clock is Jagyeoknu. Jagyeoknu is a water clock that was located in Unjong street. Jangyeongsil made this. Jangyeongsil also invented sun clock and the rain gauge, too. It was interesting to learn all of thesse, and I wanted to come here once again.