Drum, Dong Son period, 5th–3rd century BCE, Hoang (Mieu Mon) Village, My Duc District, Ha Tay Province. Bronze. National Museum of Vietnamese History, Ha Noi, LSb 5724 © Kaz Tsuruta, Asian Art Museum of San Francisco

Halberd, Dong Son period, 1st century BCE–1st century CE, Hai Phong City, Kien An District, Hai Phong Province. Bronze. National Museum of Vietnamese History, Ha Noi, LSb 1408 © Kaz Tsuruta, Asian Art Museum of San Francisco

Chicken-headed Ewer (Han type), Dong Son period, 1st–3rd century CE. Glazed stoneware. National Museum of Vietnamese History, Ha Noi, LSb 15062 © Kaz Tsuruta, Asian Art Museum of San Francisco

Burial Urn with Cover, Sa Huynh culture, 4th–2nd century BCE. An Bang site, Hoi An District, Quang Nam Province. Earthenware. Hoi An Center for Monument Management and Preservation, Cl(AB)95 © Kaz Tsuruta, Asian Art Museum of San Francisco

Bicephalous Ear Ornament, Sa Huynh culture, 3rd–1st century BCE. Giong Ca Vo site, Ho Chi Minh City, Can Gio District, Ho Chi Minh Province. Nephrite. Museum of Vietnamese History, Ho Chi Minh City, BTLS 13619 © Kaz Tsuruta, Asian Art Museum of San Francisco