'Yeomin Gongsu (Defending with the People)' explores the late-Joseon defense network linking the Seoul City Wall, Bukhansanseong Fortress and Tangchundaeseong, including the participation of ordinary residents. Although the exhibition has one title, its two venue calendars differ.
Seoul Museum of History, Special Gallery B: July 14 to November 8, 2026. The old October 25 closing date has been extended for October 26–November 8. Under a temporary September 15–November 30 extended-hours program, the main museum lists Tue/Wed/Fri/Sat/Sun 09:00–21:00 (entry to 20:30) and Thursdays 09:00–18:00 (entry to 17:30). It normally closes Mondays with public-holiday exceptions. Confirm that the specific special gallery remains open during an evening visit.
Seoul City Wall Museum: July 14, 2026, to March 7, 2027. It opens 09:00–18:00 with final admission at 17:30, closing Mondays and January 1; entry is free. Address: 283 Yulgok-ro, Jongno-gu. From Dongdaemun Station (Lines 1/4), use Exit 1 or 10 for roughly five minutes' walk. Its 29-space parking lot costs KRW 400 per five minutes, up to KRW 45,000 per day, so transit is recommended.
The main museum's temporary evening hours do NOT automatically apply to the City Wall Museum.