Notre Dame Cathedral catches fire

Smoke and flames rise during a fire at the landmark Notre Dame Cathedral in central Paris.  (Philippe Lopez/AFP/Getty Images)

People watch as smoke billows from Notre Dame Cathedral. (REUTERS/Charles Platiau)

Bystanders look on as flames and smoke billow from Notre-Dame Cathedral in Paris (Photo credit should read PATRICK ANIDJAR/AFP/Getty Images) (Patick Anidjar/AFP/Getty Images)

Seen from across the Seine River, smoke and flames rise during the fire. (Francois Guillot/AFP/Getty Images)

Flames and smoke are seen billowing from the roof at Notre Dame Cathedral. (Patrick Anidjar/AFP/Getty Images)

Smoke ascends as flames rise during the fire. (Fancois Guillot/AFP/Getty Images)

Flames and smoke are seen billowing from the roof at Notre Dame Cathedral. (Chesnot/Getty Images)

Smoke billows as the fire engulfs the spire of Notre Dame Cathedral in Paris. (REUTERS/Benoit Tessier)

Flames and smoke rise as the spire of Notre Dame Cathedral collapses. (AP/Dominique Bichon)

Flames and smoke are seen in the interior of Notre Dame Cathedral. (AP/Philip Wojazer)

Smoke is seen in the interior of Notre Dame Cathedral. (AP/Philippe Wojazer)