Seodaemun Prison (서대문형무소) is a modern prison established in 1908 by the Japanese empire in Seodaemun-gu, Seoul (서울 서대문구). It is a historical site where anti-Japanese independence activists were mainly imprisoned during the Japanese colonial period, and where oppression such as torture and executions was carried out. After being known by several names, including Gyeongseong Prison (경성감옥) and Seodaemun Prison (서대문감옥), it came to be called “Seodaemun Prison (서대문형무소).” After the March 1st Movement (3·1운동), national representatives and thousands of independence activists were incarcerated here. Today, it is preserved and operated as the Seodaemun Prison History Hall (서대문형무소역사관), serving as a museum that honors the sacrifices of independence activists and conveys historical truth.