Answer:
The church housed one of the earliest printing presses in the Philippines, established in 1608 by Father Francisco Blancas de San Jose, O.P. and Tomas Pinpin who used the facility to print books in Spanish and Tagalog.[3][4] The church was also a witness to the massacre of hundreds of Filipinos and Spaniards by the Dutch Invaders on June 23, 1647.[5] These pieces of the church's history were inscribed on a historical marker installed by the National Historical Committee (now the National Historical Commission of the Philippines) in 1939
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