San Sebastian Basilica in Quiapo, Manila, stands on the site of a church first built in 1621. Earlier churches here were rebuilt four times after damage from conflict, fire and earthquakes, so the present basilica, completed in 1891, was made of prefabricated steel parts manufactured in Belgium and shipped to Manila, a design meant to resist earthquakes and fire. It is believed to be the only all-steel church in Asia, and it has been declared a National Historical Landmark. Today the steel basilica faces new threats, including corrosion from the salt air of Manila Bay and water infiltration.
More about San Sebastian Basilica