Mokpo City's official guide lists Modern History Museum Building 1 as open 09:00–18:00, closed Mondays, with last ticket sales and entry at 17:00. Standard admission is KRW 2,000 for an individual adult or 1,500 on the group rate; for teenagers, 1,000/700; for primary pupils 500 either way. A separate Mokpo-resident adult rate is 1,000 individual or 700 group. Preschool-age admission is marked free. Check proof of eligibility and current on-site operations. Phone: 061-242-0340.