The Laguna Copperplate inscription (also shortened to LCI) is the first written document found in a Philippine language. Found in 1989 in Laguna de Bay, in the metroplex of Manila, Philippines, the LCI has inscribed on it a date of Saka era 822, corresponding to 900 CE. It contains many words from Sanskrit, old Javanese, old Malay and old Tagalog. The document releasing its bearer, Namwaran, from a debt in gold. The document mentions the places of Tondo, Pila and Pulilan in the area around Manila Bay and Medan, Indonesia. The discovery of the Inscription has highlighted the evidence found of cultural links present between the Tagalog speaking people of this time and the various contemporary civilizations in Asia, most notably the Middle kingdoms of India and the Srivijaya empire, a topic in Philippine history in which not much is presently known.
The Laguna Copperplate Inscription, among other discoveries made in recent years in the country such as the Golden Tara of Butuan and 14th century pottery and gold jewellery artifacts found in Cebu, is highly important in revising the ancient history of the Philippine archipelago (which prior to the LCI discovery was considered by western historians to be culturally isolated from the rest of Asia, as no evident pre-hispanic written records were found at the time). It sheds light on the ancient Philippine history, which was previously largely ignored due to the dominantly Hispanic-derived culture present during the Spanish occupation. This document is considered a National treasure and rests in the National Museum of the Philippines in Manila.