Early reports indicate that the blaze was accidental, but whatever the reason it's a terrible shame.I'm not a religious person myself but still it's a special place. I've been to Notre-Dame and it is amazing.
An expert in these types of roof fires has suggested the damage might not be as severe as it seems, bad enough he says but not totally catastrophic. Can be rebuilt. The stained glass windows however are lost. Terrible shame. Loved going to Paris, been several times and I hope they can rebuild it.