style and show stilted houses, dancing people, people pounding rice, beating drums and sailing, together with animal and birds. The scenes depict daily life of ancient Việt and reflect the artistic talent and mind. The drums were used as musical instruments in festivals, such as prayers for rain, for good harvest and rituals, such as weddings and funerals, as well as command in army. They were also used as funerary objects and symbol of power of tribe leaders. Classification The Heger 1 drums of the Đông Sơn culture were classified and divided into five groups by the Vietnamese scholar Pham Huy Thong in 1990, a division that implied a chronological succession. The earliest, group A, comprises a set of large and intricated decorated drums. Group B consists of a smaller drums which almost universally have a group of waterbirds in flight as their key motif on the tympanum and the mantle designs. Group C has a central panel on the tympanum made up of a row of plumed warriors placed inside another panel of waterbirds in flight. Toads line the tympanum's edge while the mantle was decorated with either patterns involving boats or geometric patterns. Notable drums Ngọc Lũ The Ngọc Lũ drum is regarded as the most important of the Đông Sơn drums. The drum was accidentally discovered in 1893 in Hà Nam Province, southeast of Hanoi, rather than during a planned expedition. In contrast to most other drums of the Dong Son, the drumhead bears three concentric panels depicting 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. Hoàng Ha The Hoàng Ha drum is a notable Đông Sơn drum. It was discovered in Hòa Bình Province in 1937 near the village of Hoàng Ha, with an outer panel of crane egrets and an inner panel which shows a procession similar to that described in the Ngọc Lũ drum, the most famous of the Đông Sơn drums. It depicts four feathered men are depicted walking in a line, brandishing spears, with two musicians in tow. A person is depicted standing under the