In November of 1600, the San Diego was refitted by the Spanish colonial government to help fight Dutch corsairs who were preying on ships entering Manila harbor. The battle took place in December and resulted in a draw, with one Dutch ship, the Mauritius, catching fire, and the San Diego, which was still laden with cargo and overloaded with the added artillery and ammunition, sinking.
Antonio de Morga, who led the Spanish fleet and survived to write about the attack in his book Sucesos de las islas Filipinas in 1609, only mentioned that the San Diego sank somewhere south of Manila Bay.
It was not until 1991 that the San Diego wreck was discovered off the town of Nasugbu in the province of Batangas. In 1992, the galleon was excavated with the help of hundreds of people of different nationalities and the support of the Philippine, French, German, Spanish and American governments.
To date, the San Diego shipwreck is the Philippines' most important underwater archeological discovery. Of the more than 30,000 artifacts found in the shipwreck, 5,000 are now in the Museum of the Filipino People. The artifacts include Chinese porcelain, Japanese swords, European cannons, helmets and astrolabes, and Mexican coins. Understandably, the San Diego collection is one of the museum's most extensive and important exhibits.
