What is a Dong Son bronze drum and why is it seen as a symbol of ancient Vietnamese culture?
A Dong Son bronze drum is a bronze artifact with a round face, bulging tympanum, straight back and flared foot, associated with the Dong Son culture of northern Vietnam. It was not only a musical instrument but also a symbol of authority, belief and the ancient Vietnamese mastery of bronze casting.
A typical Dong Son drum has four parts: the face, the bulging tympanum, the straight back and the flared foot. The face carries the densest decoration. The tympanum and back are decorated with bands of motifs running horizontally and vertically, combined with short parallel lines, tangent concentric circles and rice-grain motifs. Four paired handles are placed symmetrically, completing the structure.
According to the National Museum of History, during excavations in 2014-2015 at the Luy Lau ancient citadel site (Bac Ninh), the museum worked with Dong A University (Japan) and found nearly 1,000 fragments of drum casting molds along with many objects related to bronze casting such as crucibles, pouring pots, furnace bases and slag. This is important evidence for reconstructing the drum-making process.
Across the wide distribution of bronze drums, from southern China to mainland and insular Southeast Asia, only two sites have yielded drum casting molds: the Luy Lau ancient citadel in Bac Ninh and the Non Nong Hor site in Mukdahan province (Thailand). Of these, Luy Lau is the only place where a large number of mold fragments have been found.
How is the dating of Dong Son bronze drums determined?
The dating of Dong Son bronze drums is usually placed within the development of the Dong Son culture, tied to the metal age and the legendary Van Lang state. However, researchers still use different periodizations and datings depending on drum group, find site and typological comparison.
A notable marker is the discovery of drum casting mold fragments at Luy Lau dated to around the 3rd-4th centuries. This shows that the Vietnamese drum-casting tradition was preserved, continued and developed through history, right at an important economic, cultural and religious center such as Luy Lau.
German scientists introducing Dong Son drums at the 2022 exhibition "The World of Sky Discs" also assessed that Vietnamese bronze drums store important information and share features with sky discs from many parts of the world, including the Nebra Sky Disc made in Germany around 1670 BCE. Both archaeologists Görlitz and Wirth agreed that the imagery of the Nebra Sky Disc is unique for the Central European Bronze Age, which was also the period when Vietnam's Dong Son drums developed.
To date, Vietnam has found more than 500 Dong Son bronze drums across the country, now displayed in many museums. This number shows that the drums were not isolated objects but part of a long-lasting tradition of production and use.
What does the multi-rayed star at the center of the drum face mean?
The multi-rayed star at the center of the drum face is the most prominent motif and is generally seen as a sun symbol. On the reconstructed Dong Son drum cast in 2022, the center is a 10-rayed star interspersed with stylized peacock-feather motifs. Surrounding the center are 12 decorative bands arranged in concentric circles, each with its own motif.
An interesting finding noted by scientists is that the drum face also shows the calendar of the ancient Vietnamese, typically a 12-rayed star corresponding to the 12 months of the year. This reading does not exclude the sun-symbol meaning but adds the possibility that the star was also tied to knowledge of time and agricultural seasons.
In Dong Son visual art, spiral motifs are also seen by researcher Vu Kim Loc as sun symbols (stylized chrysanthemums). This helps explain why frog figures on some objects are placed on spiral motifs, that is, above the sun symbol.
What do Lac birds on the drum face say about the ancient Vietnamese worldview?
The Lac bird is one of the most characteristic motifs of Dong Son bronze drums. On the 2022 reconstructed drum, four Lac birds fly counterclockwise, interspersed with hairpin motifs. Together with figures dressed in bird feathers and rice grains, the Lac bird helps create a decorative world both close to daily life and rich in symbolism.
Other characteristic motifs include the sun, stilt houses, birds (phoenixes), farmers working the fields, herding, hunting, fishing, singing and dancing. The simultaneous appearance of daily scenes and sacred symbols shows that the drum face is a vivid historical picture, reflecting the cultural life, beliefs, agricultural activities and refined casting art of the ancient Vietnamese.
It is worth noting that the Lac bird does not stand alone but belongs to a rhythmic system of decorative bands. Some bands are N-shaped meander patterns, some are strips of short parallel lines; some are tangent concentric circles. From a distance, the whole face forms a continuous decorative rhythm. But up close, each band opens a different story. Human figures, Lac birds, rice grains and geometric motifs are tightly and evenly arranged, forming an expressive whole.
Are frog figures on the drum face meant for rain-making?
Frog figures on Group C Dong Son drum faces are often linked to rain-making beliefs, but this issue has many interpretations. The folk verse "The frog is the lord of heaven; whoever strikes it will be struck by heaven" dates from long ago. Researchers generally agree that this verse comes from the myth "The Frog Sues Heaven," and in folk belief the frog is linked to rain.
When frogs grind their teeth, people believe rain is coming, so they call the frog "lord of heaven" to show respect and treat it as a representative of rain, bringing favorable weather, good harvests, thriving livestock and a prosperous life. In archaeology, researchers suggest a link between this verse and Dong Son culture drums, and the frog also represents rain.
Specifically, frog figures on Group C (late Dong Son) drum faces have been explained by researchers as follows: "The frog figures on Group C Dong Son drum faces can be seen as a signal of the rain god, following folk veneration: the frog is the lord of heaven." The authors of publications such as "Dong Son drums in Viet Nam" (1990) and "Thanh Hoa Bronze Drums" (2013) also relied on frog imagery on drum faces to argue that the drums functioned for rain-making.
However, researcher Vu Kim Loc offers a notable new finding. Two collectors, Le Gia Mai and Ha My Do Co, posted images of two objects said to be belt buckle faces decorated with frog figures from the Dong Son culture, found in Thanh Hoa, 11 cm and 12.5 cm long. Both have a frog sitting on a circle engraved with spirals, with a ring on one side and a hook on the other to fasten. In dating, the appearance of the frog here is probably similar to Group C drums, that is, late Dong Son.
The unique point is that instead of being decorated like previously found belt buckle faces with sun or turtle or crocodile figures, these two objects have frog figures, and the frog sits on spirals which, according to Vu Kim Loc, are sun symbols (stylized chrysanthemums). In terms of visual-art thought and upper-lower order, the Dong Son artisan expressed the frog above the sun symbol. This may be the very way of calling it "lord of heaven" that folk tradition venerates.
From this, Vu Kim Loc argues that frog figures on Group C drum faces may share the same expressive idea as the frog on ancient jewelry, because on Group C drum faces, although the frog is a raised figure above the general decorative surface, it is placed only on the outer rim of the drum face, that is, also in the form of attending the sun god, and attending on the outermost ring.
With the discovery of jewelry decorated with frog figures, according to Vu Kim Loc, we cannot call it rain-making jewelry; perhaps it is more accurately a form of veneration. This unique appearance "challenges" the view that the drum functioned for rain-making. From there, a question arises: why was frog veneration widespread in the late Dong Son period? One explanation is that the late Dong Son period saw major droughts that caused much damage to people at the time.
How complex was Dong Son bronze drum casting technique?
Dong Son bronze drum casting technique is one of the big questions for researchers: how did ancient people cast such large drums with complex structure and refined decoration? The Luy Lau discovery provided especially important evidence to gradually decode that mystery.
The mold fragments found are no longer intact, only small scattered parts of a production process that took place centuries ago. But through archaeological methods combined with research and comparison with surviving drums, scientists can gradually reconstruct the drum shape, structure and decorative system.
In 2021-2022, the research team surveyed traditional bronze-casting villages and chose Che Dong village (Thanh Hoa) for experimental casting. After many months, a drum was made that met technical and aesthetic requirements, from thickness and weight to the decorative system and resonance.
The reconstructed drum has a face diameter of 50 cm, foot diameter of 52 cm, height of 38.2 cm and weight of 34.5 kg, cast in October 2022. Its special beauty lies first in the harmony of its forms. The drum has four parts: face, bulging tympanum, straight back and flared foot, creating a shape both sturdy and graceful.
This is not a restoration in the usual sense, nor simply a replica. It is a scientific research product realized through experiment, helping us better imagine the ancient drum-making technique. Because it was made from research on the special mold fragments at the Luy Lau ancient citadel, the drum is unique.
How are the decorative layers on the drum face organized?
The Dong Son drum face is organized on a concentric principle, with a multi-rayed star at the center and decorative bands around it. On the reconstructed drum, 12 bands surround the center, each with its own motif.
| Decorative layer | Typical motif | Suggested meaning |
|---|---|---|
| Drum face center | Multi-rayed star (10 or 12 rays), interspersed with stylized peacock feathers | Sun symbol, possibly tied to calendar and seasonal knowledge |
| Inner band | N-shaped meander, strips of short parallel lines | Decorative rhythm, possibly conventional |
| Middle band | Tangent concentric circles, figures dressed in bird feathers | Ritual activity, sacred world |
| Outer band | Lac birds flying counterclockwise, hairpin motifs, rice grains | Lac bird, agriculture, cosmology |
| Drum face rim | Four frog figures (on some Group C drums) | Rain-making belief or frog veneration |
The table shows that the drum face is not a random drawing but an ordered structure. The motifs are tightly and evenly arranged, forming an expressive whole. It is a decorative world that ancient people sent into metal. Beyond formal beauty, these motifs reflect how Dong Son people observed nature, life and their spiritual world.
Why are interpretations of the drums still unsettled?
Interpretations of Dong Son drums remain unsettled because each research group approaches from a different type of evidence: archaeology, art history, ethnology, astronomy or typological comparison. Some researchers emphasize the musical and authority-symbol functions, others focus on rain-making ritual function, and still others see the drum as a kind of "calendar" or astronomical chart.
For example, relying on frog imagery on the drum face to argue that the drum functioned for rain-making is an explanation with folk basis, but the discovery of frog figures on belt buckle faces suggests that frogs also appear in jewelry contexts, where rain-making function is hard to apply. This shows that frog imagery may carry multiple layers of meaning: both a rain symbol and an object venerated in the cosmic order.
Similarly, the multi-rayed star may be both sun and a time marker. The Lac bird may be both a real bird in daily life and a symbol of the sacred world. A cautious approach is to record parallel hypotheses, specify the degree of certainty of each type of evidence, rather than choose a single explanation and present it as settled.
How are Dong Son drums viewed in international research?
In international research, Dong Son drums are placed in the broader context of the Bronze Age and objects expressing astronomy. At the 2022 "Sky Discs" exhibition in Germany, Vietnam's Dong Son drum was introduced as an object storing important information, with features similar to sky discs from many parts of the world.
The decades-long research collaboration of Görlitz and Wirth not only conveys information about astronomy and worldviews from past eras but also takes visitors back to the Bronze Age. Using new analytical methods and image observation, archaeologists have brought breakthrough knowledge and entirely new understanding of sky discs according to perceptual-psychological criteria.
This view does not replace domestic research but adds a comparative angle. It shows that Dong Son drums are not only the heritage of one nation but part of Bronze Age human history.
Which values of Dong Son drums continue to be explored?
The value of Dong Son drums lies in many layers: bronze casting technique, visual art, belief, agricultural knowledge and cultural symbol. Each layer opens a different research direction and application in contemporary life.
In technique, the Luy Lau mold fragments continue to be studied to better understand materials, firing temperatures, mold assembly and bronze pouring. In art, the decorative system is a source of inspiration for design, decoration and aesthetic education. In belief, frog, Lac bird and multi-rayed star imagery continue to be discussed in folklore studies.
Importantly, when studying Dong Son drums, one should clearly distinguish archaeological evidence, speculative hypothesis and folk association. This distinction helps the study of ancient Vietnamese culture both respect heritage and avoid absolutizing an explanation not yet fully verified.
