The Laguna Copperplate Inscription (Inskripsyon sa Binatbat na Tanso ng Laguna), dated to 900 CE, which refers to Mount Diwata. The inscription is a legal document inscribed on a copper plate in 900 CE, is the earliest known written document found in the Philippines. Inscription mentions that the Jayadewa of Tondo is invoking the authority of the Chief of Dewata as P. Patanñe notes: This relationship is unclear but a possible explanation is that the chief of Dewata wanted it to be known that he had a royal connection in Java.(p134) Scholars after Postma, such as Patanñe (1996) and Abinales and Amoroso (2005) have come to identify the Dewata of the inscription as a settlement in or near present-day Mount Diwata, near Butuan.