Butuan, also called the Rajahnate of Butuan and the Kingdom of Butuan (Filipino: Kaharian ng Butuan; Butuanon: Gingharian hong Butuan; Cebuano: Gingharian sa Butuan; Chinese: 蒲端國; pinyin: Púduānguó), was a precolonial Bisaya polity (lungsod) centered around northeastern Mindanao island in present-day Butuan, Philippines. It was known for its gold mining, gold jewelry and other wares, and its extensive trade network across maritime Southeast Asia and elsewhere. Over its long history the lungsod had direct trading relationships with the ancient civilizations of China, Champa, Đại Việt, Pon-i (Brunei), Srivijaya, Majapahit, Kambuja, and even Persia as well as areas now comprised in Thailand. The balangay (large outrigger boats) that have been found along the east and west banks of the Libertad River (the old Agusan River) have revealed much about Butuan's history. As a result, Butuan is considered to have been a major trading port in the Caraga region during the precolonial era. Source: Wikipedia (en)