Ken Follett, a historic author, argued that the only thing flammable in the entire iconic French landmark was the rafters in the roof. He described them as “huge pieces of wood – tree trunks” which were “old but very dry”. The massive blaze has seen a huge outpouring of international grief as the flames completely destroyed the structure’s building on Monday night.
Mr Follett has extensively researched cathedrals throughout his career, becoming a best-selling writer.
He said: “When the roof timbers burn then the roof itself falls, it collapses without support.
“That then falls on the ceiling, which we should more properly call the vaulting.”
He added: “That vaulting is made of stone, but it’s very thin stone, mortared together, and when the debris from the roof falls, all of the vaulting collapses.”
READ MORE: Notre Dame Fire: Is Notre Dame still on fire?
The fire continued through the evening but French President Emmanuel Macron told reporters the “worst has been avoided”.
He also vowed to rebuild the structure and launched a fundraising campaign.
World leaders also shared their sadness at the demise of the cathedral.
US President Donald Trump said: “So horrible to watch the massive fire at Notre Dame Cathedral in Paris.”
Theresa May, UK Prime Minister, added: “My thoughts are with the people of France tonight and with the emergency services who are fighting the terrible blaze at Notre-Dame cathedral.”
According to CNN World, Laurent Nunez – secretary to the interior minister in France – said the towers in Notre Dame Cathedral “are safe”.
He told reporters at the scene: “The fire is now weaker.
“We are now in a time of cooling but both towers of the cathedral are safe.
“We’re still working to save the cathedral’s work of arts.”