The Sa Huỳnh are defined archaeologically by their burial practice: the dead were placed in large, lidded terracotta jars and interred along with objects that reveal the reach of their trade networks. Earrings of nephrite — a stone not found in central Vietnam — appear alongside iron tools, glass beads of Indian manufacture, and bronze objects. These were not isolated villagers. They were participants in a maritime exchange that stretched across much of monsoon Asia, centuries before the Silk Road sea routes became famous. The museum's collection makes this visible: case after case of jewelry, tools, and ceramic vessels recovered from sites in and around Hội An, including the critical excavation at Bai Ong on nearby Cham Island.

The museum's most significant holding comes from Bai Ong, a site on Cham Island approximately 15 kilometers offshore from Hội An. Excavations there extended the Sa Huỳnh timeline back by 3,000 years — pushing the culture's earliest traces to around 1000 BCE and establishing that the islands the Cham people later held sacred had been inhabited, and used as a burial ground, long before recorded history. The Bai Ong collection gives the museum its claim to national significance: no other institution in Vietnam holds a comparably deep record of Sa Huỳnh material. What looks at first like an unremarkable room of terracotta becomes, with context, one of the most important windows into the pre-Champa history of this coast.

The Sa Huỳnh did not simply disappear. Scholars trace a cultural continuity between them and the Cham people, the Malayo-Polynesian civilization that built Hội An into a major trading port during the first millennium CE. The Champa Kingdom, which dominated the central Vietnamese coast for over a thousand years, drew on foundations the Sa Huỳnh laid: the knowledge of the sea, the trade routes, the anchorages. Walking from the museum back into Hội An's ancient streets — the Japanese Covered Bridge, the merchant houses with their Chinese tiles and Vietnamese proportions — is to walk across layers of settlement. The Sa Huỳnh were the first, but the town has been continuously inhabited and rebuilt on top of everything they left.

The museum occupies one of Hội An's heritage buildings on Trần Phú Street, the town's main cultural corridor. It is not large. Two rooms hold the core collection, displayed without theatrical lighting or elaborate staging — the objects speak more clearly for the restraint. The terracotta burial jars are the centrepieces: some complete, some fragmentary, their forms simple and striking. Labels and interpretive text place each piece within the broader Sa Huỳnh story, connecting a particular bronze ring or glass bead to a trade network that once made this stretch of coast one of the most commercially active in Asia. For anyone who has just walked the ancient town, the museum provides the deep history that makes the surface legible.