VNS Photo Nguyen My Ha Some experts from National Museum of History and University of East Asia has unearthed archaeology in Luy Lau citadel, Thanh Khuong commune, Thuan Thanh district in 2015 and found trace at Viet Nam's oldest citadel in Bac Ninh Province.Luy Lau Citadel was the heart of the area for ten centuries beginning in the 1st century, and is located in modern day Bac Ninh Province,