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San Guillermo Parish Church (Sunken Shrine)

The half-buried Baroque church engulfed by Pinatubo's lahar in 1991 — now the "Sunken Shrine" and a monument to the eruption

Transformed — The San Guillermo Parish Church, a Baroque structure erected as early as 1576, was left half-submerged by successive lahar surges from Mount Pinatubo's catastrophic 1991 eruption. Today its windows serve as entrances and its altar has been partly excavated from the volcanic mud — a place known as the "Sunken Shrine."

San Guillermo Parish Church was built in Bacolor, Pampanga, with founding roots as early as 1576, making it one of the oldest churches in the Philippines. It was an enduring Baroque structure that had survived earthquakes, fires and centuries of history, a beloved landmark of the town.

In June 1991 Mount Pinatubo erupted in one of the largest volcanic eruptions of the 20th century, sending enormous volumes of ash and lahar (volcanic mudflows) sweeping down the surrounding river valleys. Over the following years, successive lahar surges buried much of Bacolor in meters of volcanic debris. The San Guillermo Church was engulfed up to its lower half — its ground floor and much of its congregation space buried in mud.

The result was remarkable and haunting. The church survived, but only its upper levels remained above the mud; its windows became doorways, and its grand interior was partly excavated over time. What remains is known as the Sunken Shrine, a place people can now enter through what were once windows, a living monument to the power of the Pinatubo eruption.

Quick facts

Built
c. 1576 (Baroque, Bacolor)
Location
Bacolor, Pampanga
The eruption
June 1991 (Mount Pinatubo)
The effect
Engulfed by successive lahar surges
Result
Lower half buried; windows became doors
Known as
The "Sunken Shrine"
Today
Partly excavated; a monument to the eruption

Sources

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