The Leaning Tower of Pisa is just one of numerous world-renowned structures
that experts have struggled to protect in recent years. Some, like the
Washington Monument, required reasonably straightforward restorations, while
others, such as Egypt's Philae Temple, called for truly imaginative
conservation strategies. And then there's New York's CitiCorp Headquarters,
whose emergency repair in the late 1970s may have saved it from sudden,
catastrophic collapse. What follows are some of the more prominent conservation
efforts from the past 25 years.
Rob Meyer is Production Assistant for NOVA Online. Jeff Oar, NOVA Online
intern, conducted research for this piece.