Seodaemun District (Seodaemun-gu) is a
gu located in northwestern
Seoul,
South Korea. The name derives from
Seodaemun, meaning literally "Great West Gate", which was once located in the district. Seodaemun was one of the four great gates of the city wall surrounding the
Joseon capital of
Hanyang (only
Dongdaemun and
Namdaemun survive intact, though the latter was destroyed by arson in 2008 and only recently rebuilt).