Corrosion of World Monuments

The World Monuments Fund announced the 2010 World Monuments Watch, a list of 93 sites in 43 countries termed “at risk.” The list includes nine sites in the U.S. and 15 dating from the 20th century. One of the sites is the Gothic Revival, an all-steel basilica of San Sebastian in Manila. After earthquakes in 1645, 1762, and 1863 destroyed the first three stone and brick churches erected on this site, the Spanish Insular government recommended a new church be built of steel. Since its completion in 1891, San Sebastian has continued to play a significant religious and social role as the community parish and through its involvement in outreach programs. The innovative steel construction remains unique and reflects the daringness of the design and the skill of local craftsmen. Persistent corrosion, leaks, and material loss threaten the Basilica, but its most pervasive threat remains invisible: the structural bracing within cavity walls is severely deteriorating, potentially rendering the stability and continued functionality of San Sebastian precarious.