Discovery
The Laguna Copperplate Inscription was found in 1989 near the mouth of the Lumbang River near Laguna de Bay, by a man who was dredging sand to turn into concrete. Suspecting that the artifact might have some value, the man sold it to an antique dealer who, having found no buyers, eventually sold it to the National Museum of the Philippines, where it was assigned to Alfredo E. Evangelista, head of its Anthropology Department.
A year later, Antoon Postma noted that the inscription was similar to the ancient Indonesian script of Kawi. Postma translated the script and found the document dated itself to the Saka year 822, an old Hindu calendar date which approximately corresponds to 900 CE. This meant that the document pre-dated the arrival of Ferdinand Magellan in 1521 and is from about the same time as the mention of Philippines in the official Chinese Sung History for the year 972.
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