Everything that had to go wrong for Notre-Dame Cathedral to burn down so fast

 

https://www.businessinsider.co.za/heres-what-led-to-the-collapse-of-the-notre-dame-cathedral-2019-4

 

Description: PARIS, FRANCE - APRIL 14: Fire rages through the i

Also read:
Before the Notre-Dame Cathedral caught fire, it was undergoing renovations

https://www.thisisinsider.com/notre-dame-undergoing-renovations-before-fire-2019-4