Photo Gallery: A Century-Long Project 08/10/2010
  During World War II, carpet-bombing by Allied forces leveled up to 80 percent...
DPA

During World War II, carpet-bombing by Allied forces leveled up to 80 percent of the historic buildings in Germany's main cities in an unprecedented wave of destruction prompted by the no less unprecedented barbarity of the Nazis. Here, an aerial shot of Cologne taken in 1945.