A precolonial Bisaya polity centered on the Agusan River delta in northeastern Mindanao, renowned for gold mining and jewelry and for a long-distance maritime trade network reaching China, Champa, Đại Việt, Srivijaya, Majapahit, and Persia; sent a tribute mission to Song China in 1001.
Declined in prominence relative to Cebu and Manila by the 16th century and came under Spanish colonial administration following contact in the 1520s.
Foundational scholarly compilation and critical assessment of the source base (Chinese records, archaeology, oral tradition) for precolonial Philippine polities including Butuan.