Flames burn the roof of the landmark Notre-Dame Cathedral in central Paris on April 15, 2019. (credit: Francois Guillot/AFP/Getty Images)
Notre Dame Cathedral Fire
Flames and smoke are seen billowing from the roof at Notre-Dame Cathedral in Paris on April 15, 2019. (credit: Geoffroy Van Der Hasselt/AFP/Getty Images)
Notre Dame Cathedral Fire
Smoke and flames rise during a fire at the landmark Notre-Dame Cathedral in central Paris on April 15, 2019, potentially involving renovation works being carried out at the site, the fire service said. - A major fire broke out at the landmark Notre-Dame Cathedral in central Paris sending flames and huge clouds of grey smoke billowing into the sky, the fire service said. The flames and smoke plumed from the spire and roof of the gothic cathedral, visited by millions of people a year, where renovations are currently underway. (credit: Francois Guillot/AFP/Getty Images)
Notre Dame Cathedral Fire
Flames burn the roof of the landmark Notre-Dame Cathedral in central Paris on April 15, 2019, potentially involving renovation works being carried out at the site, the fire service said. (credit: Francois Guillot/AFP/Getty Images)
Notre Dame Cathedral Fire
Flames burn the roof of the landmark Notre-Dame Cathedral in central Paris on April 15, 2019, potentially involving renovation works being carried out at the site, the fire service said. (credit: Francois Guillot/AFP/Getty Images)
Notre Dame Cathedral Fire
Flames burn the roof of the landmark Notre-Dame Cathedral in central Paris on April 15, 2019, potentially involving renovation works being carried out at the site, the fire service said. (credit: Francois Guillot/AFP/Getty Images)
Notre Dame Cathedral Fire
Flames burn the roof of the landmark Notre-Dame Cathedral in central Paris on April 15, 2019, potentially involving renovation works being carried out at the site, the fire service said. (credit: Francois Guillot/AFP/Getty Images)
Notre Dame Cathedral Fire
Flames burn the roof of the landmark Notre-Dame Cathedral in central Paris on April 15, 2019, potentially involving renovation works being carried out at the site, the fire service said. (credit: Francois Guillot/AFP/Getty Images)
Notre Dame Cathedral Fire
Flames burn the roof of the landmark Notre-Dame Cathedral in central Paris on April 15, 2019, potentially involving renovation works being carried out at the site, the fire service said. (credit: Francois Guillot/AFP/Getty Images)
Notre Dame Cathedral Fire
Smoke and flames rise during a fire at the landmark Notre-Dame Cathedral in central Paris on April 15, 2019, potentially involving renovation works being carried out at the site, the fire service said. (credit: Francois Guillot/AFP/Getty Images)
Notre Dame Cathedral Fire
Smoke and flames rise during a fire at the landmark Notre-Dame Cathedral in central Paris on April 15, 2019, potentially involving renovation works being carried out at the site, the fire service said. (credit: Geoffroy Van Der Hasselt/AFP/Getty Images)
Notre Dame Cathedral Fire
Flames and smoke are seen billowing from the roof at Notre-Dame Cathedral in Paris on April 15, 2019. (credit: Patrick Anidjar/AFP/Getty Images)
Notre Dame Cathedral Fire
Flames and smoke are seen billowing from the roof at Notre-Dame Cathedral in Paris on April 15, 2019. (credit: Patrick Anidjar/AFP/Getty Images)
Notre Dame Cathedral Fire
Flames and smoke are seen billowing from the roof at Notre-Dame Cathedral in Paris on April 15, 2019. (credit: Patrick Anidjar/AFP/Getty Images)
Notre Dame Cathedral Fire
People watch the landmark Notre-Dame Cathedral burning in central Paris on April 15, 2019. (credit: Philippe Lopez/AFP/Getty Images)