Dongdaemun District (, "Great Eastern Gate") is one of the 25 districts of Seoul, South Korea. Dongdaemun has a population of 346,770 (2010) and has a geographic area of 14.22 km2 (5.49 sq mi), and is divided into 14 dong (administrative neighborhoods). Dongdaemun is located in northeastern Seoul, bordering the city districts of Seongbuk to the northwest, Jongno to the west, Seongdong to the south, Gwangjin to the southeast, and Jungnang to the east. Dongdaemun is part of the Seongjeosimni (Outer old Seoul) area and is named after Heunginjimun, one of the Eight Gates of Seoul which is not located within the district. Dongdaemun is home to the University of Seoul, Cheongnyangni station, and to Gyeongdong Market, one of the largest herbal medicine and agricultural markets in South Korea. Yoo Deok-yeol (유덕열) of the Democratic Party has been the mayor of Dongdaemun since July 2010. History Dongdaemun District was first created in 1943 when the "gu" system started and was larger in area than it is today. Seongbuk District separated from the district in 1949, and Changsin Dong and Sungin Dong were given to Jongno District in 1975. An additional 17 dong (neighborhoods) separated to become Jungnang District in 1988. Administrative divisions Dongdaemun District currently comprises 14 dongs. Cheongnyangni-dong Dapsimni 1-dong Dapsimni 2-dong Hoegi-dong Hwigyeong 1-dong Hwigyeong 2-dong Imun 1-dong Imun 2-dong Jangan 1-dong Jangan 2-dong Jegi-dong Jeonnong 1-dong Jeonnong 2-dong Yongsin-dong Transportation Underground Korail(Korean Railway) and Seoul Metro Underground Line 1 (Jongno-gu) ← Sinseol-dong — Jegi-dong — Cheongnyangni — Hoegi — Hankuk University of Foreign Studies — Sinimun → (Seongbuk-gu) Seoul Metro Underground Line 2 (Seongdong-gu) → Yongdu − Sinseol-dong Seoul Metropolitan Rapid Transit Corporation Underground Line 5 (Seongdong-gu) ← Dapsimni — Janghanpyeong → (Gwangjin-gu) Korail(Korean Railway) Jungang Section Line from Yongsan to Paldang (Seongdong-gu) ← Cheongnyangni (aboveground) — Hoegi → (Jungnang-gu) There are more stations will add. Geography Dongdaemun District borders Seongbuk District to the north-west, Jungnang District to the east (with the Jungnangcheon stream forming the border), Gwangjin District to the south-east, Seongdong District to the south, meets Jung District at a point in the south-west and borders Jongno District to the west. The busiest neighbourhood of the district is the Cheongnyangni area - a large commercial zone formed around Cheongnyangni Station, one of the secondary CBDs of Seoul. Dongdaemun District is named after the east gate in Seoul's city walls, Dongdaemun, but Dongdaemun itself is actually