Workers excavate in ...: Workers excavate in the archeological site of Thang Long ancient citadel on Hanoi Jan 31, 2004. This Forbidden Citadel of Vietnam's former dynasties (from 11th to 18th century) was covered under the ground of Hanoi nowadays and has just been unearthed in 2003. The square of excavated site is about 22.400m2. KTS photo/ Nguyen Hong Sam /Nguyen Hong Sam