Discovered in September 1959, when digging soil to embank Men's road from National Highway III through Cổ Loa to Vietnam Film Studio.
The location is about 600m from National Highway 3, nearly 200m from the citadel, about 6m from the center of the causeway, about 0.60m deep, workers discovered a pile of bronze arrows lying in a pit shaped square about 1m each side, about 1.20m deep.
View of Cầu Vực site
On July 18, 1959, the Department of Museum Conservation coordinated with Vinh Phuc province officials to open an on-site investigation into the discovery of copper arrows. The results can be summarized as follows:
The copper arrows and artifacts collected weighed 93kg, each kilogram had about 97 arrows, the number of arrows collected nearly 10,000 pieces. According to the size, there are 7 types of arrow: the longest 11cm, the shortest 6cm. The arrows are all pointed, sharp, with 3 edges at the tip, and concave edges in the shape of a trough. In addition to the intact arrows, there was an estimated 0.001m3 of debris. The arrows are arranged in groups of the same or opposite direction, separated by a thin layer of unknown substance. When it first appeared, the arrow was soft, but not broken, when raised from the ground for a while, it was very hard.
After sorting, it can be seen that l/4 of the arrows after casting have been modified, the remaining 3/4 of the arrows have not been edited. The arrows are all the same rust green color, there are arrows attached to three, four or lumps.
The inspection pit around the place where the arrow was discovered, showed that, from the surface layer to the original soil layer, the soil was homogeneous, there was no trace of the cultural layer, and no relics were detected. Therefore, this may be a hiding place or an armory of the An Duong Vuong period. The discovery of the famous Cầu Vực bronze arrow store marked an important opening in the study of Cổ Loa history in general and Cổ Loa archeology in particular. After the discovery of Cầu Vực, a series of pre-Dong Son and Dong Son archaeological sites were discovered and excavated.
