Notre Dame Cathedral In Paris Burns

Flames and smoke are seen billowing from the roof at Notre-Dame Cathedral in Paris on April 15, 2019. - A fire broke out at the landmark Notre-Dame Cathedral in central Paris, potentially involving renovation works being carried out at the site, the fire service said. (Photo by Thomas SAMSON / AFP) (Photo credit should read THOMAS SAMSON/AFP/Getty Images)

FILES-FRANCE-FIRE-NOTRE DAME

The steeple collapses as smoke and flames engulf the Notre-Dame Cathedral in Paris on April 15, 2019. - A huge fire swept through the roof of the famed Notre-Dame Cathedral in central Paris on April 15, 2019, sending flames and huge clouds of grey smoke billowing into the sky. The flames and smoke plumed from the spire and roof of the gothic cathedral, visited by millions of people a year. A spokesman for the cathedral told AFP that the wooden structure supporting the roof was being gutted by the blaze. (Photo by Geoffroy VAN DER HASSELT / AFP) (Photo credit should read GEOFFROY VAN DER HASSELT/AFP/Getty Images)

FILES-FRANCE-FIRE-NOTRE DAME

Smoke billows as flames engulf the Notre-Dame Cathedral in Paris on April 15, 2019. - A huge fire swept through the roof of the famed Notre-Dame Cathedral in central Paris on April 15, 2019, sending flames and huge clouds of grey smoke billowing into the sky. The flames and smoke plumed from the spire and roof of the gothic cathedral, visited by millions of people a year. A spokesman for the cathedral told AFP that the wooden structure supporting the roof was being gutted by the blaze. (Photo by Thomas SAMSON / AFP) (Photo credit should read THOMAS SAMSON/AFP/Getty Images)

FRANCE-FIRE-NOTRE-DAME

Firefighters douse flames rising from the roof at Notre-Dame Cathedral in Paris on April 15, 2019. - A fire broke out at the landmark Notre-Dame Cathedral in central Paris, potentially involving renovation works being carried out at the site, the fire service said. (Photo by Bertrand GUAY / AFP) (Photo credit should read BERTRAND GUAY/AFP/Getty Images)

FRANCE-FIRE-NOTRE DAME

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. (Photo by Hubert Hitier / AFP) (Photo credit should read HUBERT HITIER/AFP/Getty Images)

FILES-FRANCE-FIRE-NOTRE DAME

Flames are seen through the collapsing roof of the Notre-Dame Cathedral in Paris on April 15, 2019. - A huge fire swept through the roof of the famed Notre-Dame Cathedral in central Paris on April 15, 2019, sending flames and huge clouds of grey smoke billowing into the sky. The flames and smoke plumed from the spire and roof of the gothic cathedral, visited by millions of people a year. A spokesman for the cathedral told AFP that the wooden structure supporting the roof was being gutted by the blaze. (Photo by Thomas SAMSON / AFP) (Photo credit should read THOMAS SAMSON/AFP/Getty Images)

FRANCE-FIRE-NOTRE DAME

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. (Photo by Hubert Hitier / AFP) (Photo credit should read HUBERT HITIER/AFP/Getty Images)

FRANCE-FIRE-NOTRE DAME

Flames and smoke are seen billowing from the roof at Notre-Dame Cathedral in Paris on April 15, 2019. - A fire broke out at the landmark Notre-Dame Cathedral in central Paris, potentially involving renovation works being carried out at the site, the fire service said.Images posted on social media showed flames and huge clouds of smoke billowing above the roof of the gothic cathedral, the most visited historic monument in Europe. (Photo by LUDOVIC MARIN / AFP) (Photo credit should read LUDOVIC MARIN/AFP/Getty Images)

FRANCE-FIRE-NOTRE-DAME

Flames and smoke are seen billowing from the roof at Notre-Dame Cathedral in Paris on April 15, 2019. - A fire broke out at the landmark Notre-Dame Cathedral in central Paris, potentially involving renovation works being carried out at the site, the fire service said. (Photo by Thomas SAMSON / AFP) (Photo credit should read THOMAS SAMSON/AFP/Getty Images)

FRANCE-FIRE-NOTRE-DAME

Flames are seen rising from the roof at Notre-Dame Cathedral in Paris on April 15, 2019. - A fire broke out at the landmark Notre-Dame Cathedral in central Paris, potentially involving renovation works being carried out at the site, the fire service said. (Photo by STEPHANE DE SAKUTIN / AFP) (Photo credit should read STEPHANE DE SAKUTIN/AFP/Getty Images)

FRANCE-FIRE-NOTRE-DAME

A firefighter uses a hose to douse flames and smoke billowing from the roof at Notre-Dame Cathedral in Paris on April 15, 2019. - A fire broke out at the landmark Notre-Dame Cathedral in central Paris, potentially involving renovation works being carried out at the site, the fire service said. (Photo by Thomas SAMSON / AFP) (Photo credit should read THOMAS SAMSON/AFP/Getty Images)

FRANCE-FIRE-NOTRE-DAME

Firefighters douse flames and smoke billowing from the roof at Notre-Dame Cathedral in Paris on April 15, 2019. - A fire broke out at the landmark Notre-Dame Cathedral in central Paris, potentially involving renovation works being carried out at the site, the fire service said. (Photo by Bertrand GUAY / AFP) (Photo credit should read BERTRAND GUAY/AFP/Getty Images)

FRANCE-FIRE-NOTRE DAME

A firefighter uses a hose to douse flames and smoke billowing from the roof at Notre-Dame Cathedral in Paris on April 15, 2019. - A fire broke out at the landmark Notre-Dame Cathedral in central Paris, potentially involving renovation works being carried out at the site, the fire service said.Images posted on social media showed flames and huge clouds of smoke billowing above the roof of the gothic cathedral, the most visited historic monument in Europe. (Photo by Geoffroy VAN DER HASSELT / AFP) (Photo credit should read GEOFFROY VAN DER HASSELT/AFP/Getty Images)

FRANCE-FIRE-NOTRE-DAME

Seen from the Belleville Park, smoke and flames rise during a fire at the landmark Notre-Dame Cathedral in central Paris on April 15, 2019. - A fire broke out at the landmark Notre-Dame Cathedral in central Paris, potentially involving renovation works being carried out at the site, the fire service said. (Photo by Aurore MESENGE / AFP) (Photo credit should read AURORE MESENGE/AFP/Getty Images)

FRANCE-FIRE-NOTRE DAME

The steeple of the landmark Notre-Dame Cathedral collapses as the cathedral is engulfed in flames in central Paris on April 15, 2019. - A huge fire swept through the roof of the famed Notre-Dame Cathedral in central Paris on April 15, 2019, sending flames and huge clouds of grey smoke billowing into the sky. The flames and smoke plumed from the spire and roof of the gothic cathedral, visited by millions of people a year. A spokesman for the cathedral told AFP that the wooden structure supporting the roof was being gutted by the blaze. (Photo by Geoffroy VAN DER HASSELT / AFP) (Photo credit should read GEOFFROY VAN DER HASSELT/AFP/Getty Images)

TOPSHOT-FRANCE-FIRE-NOTRE DAME

TOPSHOT - Flames and smoke are seen billowing from the roof at Notre-Dame Cathedral in Paris on April 15, 2019. - A fire broke out at the landmark Notre-Dame Cathedral in central Paris, potentially involving renovation works being carried out at the site, the fire service said.Images posted on social media showed flames and huge clouds of smoke billowing above the roof of the gothic cathedral, the most visited historic monument in Europe. (Photo by Patrick ANIDJAR / AFP) (Photo credit should read PATRICK ANIDJAR/AFP/Getty Images)

FRANCE-FIRE-NOTRE DAME

Flames burn the roof of the landmark Notre-Dame Cathedral in central Paris on April 15, 2019. - 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. (Photo by FRANCOIS GUILLOT / AFP) (Photo credit should read FRANCOIS GUILLOT/AFP/Getty Images)

TOPSHOT-FRANCE-FIRE-NOTRE DAME

TOPSHOT - 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. - 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. (Photo by FRANCOIS GUILLOT / AFP) (Photo credit should read FRANCOIS GUILLOT/AFP/Getty Images)

TOPSHOT-FRANCE-FIRE-NOTRE DAME

TOPSHOT - 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. (Photo by FRANCOIS GUILLOT / AFP) (Photo credit should read FRANCOIS GUILLOT/AFP/Getty Images)