The blaze took just 63 minutes to engulf the building and bring its famous spire crashing to the ground, as smoke enveloped the skies of the French capital, with firefighters struggling to control the flames.
French president Emmanuel Macron has already pledged to launch an international fundraiser to pay for the reconstruction. Speaking at the scene last night Macron said:
We'll rebuild this cathedral all together and it's undoubtedly part of the French destiny and the project we'll have for the coming years.
That's what the French expect [and] because it's what our history deserves.
Other world leaders offered their condolences to the French people last night including Theresa May, Justin Trudeau and Leo Varadkar.
My thoughts are with the people of France tonight and with the emergency services who are fighting the terrible bla… https://t.co/IZJFuUbO8G