A Vietnamese archeol...: A Vietnamese archeologist shows some features of a wooden pillar in Forbidden Citadel of Thang Long in Hanoi on Jan 31, 2004. The system of pillars as well as foundation has shown a great development in architecture of Vietnam's former dysnaties from 11th to 18th centuries. This Forbidden Citadel was uncoverd when a new National Assembly House was built in Hanoi in 2003. KTS photo/ Nguyen Hong Sam /Nguyen Hong Sam