The National Customs Museum is a specialized customs museum located at the Seoul Customs headquarters in Gangnam-gu, Seoul. It displays the history and work of customs duties on imported and exported goods through about 11,000 collected items. The museum opened on August 27, 2000, to mark the 30th anniversary of the Korea Customs Service. Modern customs work in Korea began in 1878 at the Dumo Port customs house in Busan.