Korean national flag 태극기

There are many flags which symbolize heavenly bodies , the sun, stars, and the moon are used in many flags.
For instance, the Japanese flag was made by drawing the sun only, Egypt, Turkey and Pakistan have the moon drawn in them, Chile has the South Pole Star.
We cannot find a national flag in the world similar to our own 태극기, which illustrate the origin of how the universe came into being. It shows the confusion before the separation of heaven and earth and symbolize, in four trigrams, the four seasons and four directions.
The four trigrams are said to carry the following meaning.

건 : heaven, spring, east, benevolence
곤 : earth, summer, west, righteousness
감 : sun, autumn, south, courtesy
리 : moon, winter, north, knowledge

It is said that the 태극기 flag was first flown in August of 1882, the 19th year of King Kojong of the Yi Dynasty. A treaty was made at the time between Korea and Japan at 제물포 to end hostilities resulting from Hideyosi's invasion of Korea in 1592.
To affect this treaty 김옥균, 박영효 went to Japan as special envoys, and feeling the necessity of having a national flag, they created this one.