The San Guillermo Church in Bacolor. Pampanga was initially built by the Augustinian Friars in 1576. However, in 1880, the church was devastated by an earthquake and subsequently reconstructed in 1886. Tragically, on September 3, 1995, lahar flow from the slopes of Mount Pinatubo, which had erupted on June 15, 1991, engulfed the church, burying it to half its original height of 12 meters.