The story of the fire in graphics and images
https://www.bbc.com/news/world-europe-47947425
Why the cathedral blaze was difficult to tackle
https://www.bbc.com/news/world-europe-47945471
How a cathedral became the heart of France
https://www.bbc.com/news/world-europe-47960184
New York police arrest man with petrol in St Patrick’s Cathedral
https://www.bbc.com/news/world-us-canada-47973354
Notre-Dame fire: excellent BBC articles