Round collar robe

Round collar robe (團領, pinyin: tuán lǐng, Hangul: 단령 Danryeong or dallyeong) was clothing of East Asian cultural sphere, which was used as Gwanbok. It is a round-collared outer garment which is long enough to cover the entire body.
History.
In Korea, the danryeong was introduced from Tang dynasty by Kim Chun-chu in the second year of Queen Jindeok's rule. Since then, it has been worn as a official outfit for government officials until the end of Joseon. It originated from the Chinese' round collar robe.
In late Joseon, under the 1884 decree of King Gojong, only black-coloured danryeong were permitted to be worn by court officials.