Nowadays, there are currently only three walls left in this area. Generally, those have the height of 2m and the weight of 15m. This citadel was latterly taken by a Chinese invasion in 208 BCE, but in 939 CE the site was re-occupied by Ngo Quyen, the leader of a resistance against the rule of Chinese forces. Then, Co Loa citadel was picked to be the capital of the country again. Visitors can see a communal house and temples which are located in the center of the former citadel, that are used to dedicate to King An Duong Vuong (257 – 208 BCE) and his daughter My Chau.

When the archaeologists excavated this area in 1968, 1978 and 1997, a multitude of artefacts was discovered, consisting of bronze and stone arrow heads, jewelry, utensils and kettle drums. During the period from 2001 and 2009, the Hanoi authorities have spent around 300 billion VND (US$ 19 million) to renovate this citadel. Annually, the communal house and temples usually celebrate the Co Loa festival for the Lunar New Year occasion.

Cổ Loa Festival in Hà Nội Capital City {itpsharepoint}