"......to have a fire on the roof of Notre-Dame, someone had to bring something there, and lit it up."

Via Kirk 

Here is the latest update from Maxime Lépante, our French correspondent in France (emphasis is mine):

This is an update about what we know today about the fire that destroyed the roof and parts of the vaults of Notre-Dame:

1) Restoration work hadn’t started on the roof. The scaffolding were still being put in place. The architect in chief of the “Monuments Historiques” (“Historical Monuments”, the administration that maintains and repairs monuments in France), Philippe Villeneuve, who was responsible for the refurbishing of the spire of Notre-Dame, has stated that : “Work had not started yet, scaffoldings were still being built” 

More @ Pamela Geller