Pannai

Pannai, Panai or Pane was a Buddhist kingdom located on the east coast of Northern Sumatra that existed between the 11th and 14th centuries. The kingdom was located on the Barumun River and Panai River valleys, in today's Labuhan Batu and South Tapanuli regencies. Because surviving inscriptions and historical records of this period are scarce, the kingdom is among the least known political entities in Indonesian history. Historians suggest that Pannai was probably a principality or a vassal allied under the Srivijayan mandala and later to Dharmasraya kingdom.

The historical records mentioning this kingdom derived from Indian and Javanese sources. The state of Pannai, with river runs through it, was mentioned in the Tanjore inscription dating from the 11th century, as one of the polity sacked by Rajendra Chola I of Chola dynasty during his campaign against the prosperous Srivijaya. Three centuries later, Prapanca confirmed Pannai as one of the Malay states targeted in Majapahit's foreign diplomacy.