Because the flames unfold alongside the roof of the constructing, the blaze toppled the spire on the high of the constructing whereas Parisians posted pictures and video from across the metropolis.
Then, the roof itself collapsed.
The pictures are dramatic, displaying the 850-year-old church surrounded by vivid orange, blacks, and a smoky haze.
It stays to be seen how a lot of the invaluable artwork and artefacts inside the constructing had been eliminated earlier than the roof got here crashing down.
Quickly after the blaze started, French President Emmanuel Macron cancelled a deliberate tackle to the nation, and an investigation was introduced earlier than the blaze had even been put out.
The fireplace prompted an outpouring of grief from throughout the globe.