Following excavation work at the Dong Trong I and II grottoes in the northern province of Quang Ninh, archaeologists affirmed that this was the tomb of Stone Age humans belonging to the Ha Long culture (3,000-4,000 years ago).

Meanwhile, bronze work excavated at Go Bong in the northern province of Phu Tho has shed light on the Phung Nguyen culture (about 3,500-4,000 years ago).

Last year, a major dig at the Co Loa’s Thuong Temple on the outskirts of Hanoi revealed that it was a major centre of activity during the An Duong Vuong and Ngo Quyen dynasties. Much of the metalwork for Co Loa Citadel (built in the year 257BC) was also made there.

Together with the US’s Illinois University, excavation work at Luy Hao – Thanh Trung revelaed that the Co Loa Citadel was the site of an earlier structure, and that it had been enlarged four times.

After the fifth excavation of the Ho Citadel in the central province of Phu Yen dating from the 5^th-7^th century, archaeologists from the institute and the Phu Yen Museum discovered that the Cham culture had reached a high degree of sophistication.