The well was discovered while the archaeologists were working onexcavating two tombs built during the first century and the fourth-sixthcentury that were unearthed earlier this month.
More than a week later, the archaeologists discovered 27 objectsincluding pottery, iron nails, a broken copper bowl and a glass string.
A pottery vase, shaped like a rooster, is considered to be the most valuable artefact that was discovered.
Associate Prof Nguyen Lan Cuong, Deputy Secretary General of theVietnamese Association of Archaeology, said the well is very deep.
The researchers have so far gone 3.5m into the ground, but they have yet to reach the structure's bottom.
When the excavation is finished, the old well may be exhibited in the Hanoi Museum.
Associate Prof Tong Trung Tin, Director of the Institute ofArchaeology, is thrilled by the discovery because the artefacts arestill intact.
"The artefacts will help us understandthe funeral rites and tomb building techniques that were practised byour ancestors," he said./.