Part of Notre Dame on fire.

[BrianSoddingBoru4]

Actually, the Crown was alluded to as a physically persevered relic as early as the third century.

I don't believe that the Crown at Notre Dame (or any of its various fragments scattered here and there) is genuine.  But there's no real evidence that it isn't genuine.

Boru

That crown exists because the marketers who successfully sold it, were marketing a story. Not any real event.

What evidence do you have to support that claim?

Boru