Archaeologists working at the Thang Long Citadel in Hanoi discover the remains of Ly Dynasty architecture and water system beneath the existing foundations.
Vestiges of Ly Dynasty found at Thang Long Citadel
SGGP, 27 December 2012
Many more relics revealed under Thang Long Citadel
Vietnam Net, 28 December 2012
Ancient water system found at Citadel
Tuoi Tre News, 28 December 2012