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San Agustin, Manila. Located inside Manila's walled city of Intramuros. By Patrick Roque - Taken using my camera with model DSC-HX5V, CC BY-SA 3.0.
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Paoay Church of San Agustin. Note the heavy buttresses, protection against earthquakes, and Javanese spires on the facade.
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Santa Maria, Ilocos Sur. The only hilltop citadel among the 4 great Baroque churches.
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Miagao Church of Santo Tomas. Known as the "fortress church," because it served as refuge from Muslim raiders. By Alienscream - Own work, CC BY-SA 3.0.