Korean heraldry

National emblem of the Republic of Korea

National emblem of the Democratic People's Republic of Korea

Taegeuk (, ) is a Sino-Korean term meaning "supreme ultimate", although it can also be translated as "great polarity / duality / extremes". The term and its overall concept is derived from the Chinese Taiji, popularised in the west as the Yin and Yang. The symbol was chosen for the design of the Korean national flag in the 1880s. It substitutes the black and white color scheme often seen in most taijitu illustrations with blue and red, respectively, along with a horizontal separator, as opposed to vertical.

one of the symbols of the Korean Empire (1897–1910)