?繫ng S??n was a prehistoric Bronze Age culture in Vietnam centered on the Red River Valley of northern Vietnam. At this time the first Vietnamese kingdoms of V?n Lang and ?u L廕︷ appeared. Its influence flourished in other neighbouring parts of Southeast Asia from about 500 BCE to 100 CE.

The Ngoc Lu drum is regarded as the most important of the Dong Son drums. The drum was accidentally discovered in 1893 in Ha Nam Province, southeast of Hanoi.

In contrast to most other drums of the Dong Son, the tympanum bears three concentric panels, which depict animals or humans, interleaved with bands of geometric or circular patterns. The innermost panel appears to be a self-referencing depiction, as it is decorated with pictures of humans who appear to be performing a ceremony involving the drums themselves. Other musical instruments and rice growing and harvesting activities are also shown. The two outer panels are decorated with scenes of deer, hornbills and crane egrets.