I’ve been chatting with a friend. Here’s an idea.
Those who are responsible for Notre Dame Cathedral might sell cubes of charred wood and vault from the burned roof. Say, 1 cm (5 cm for a lot more). This would give non-billionaires the chance to participate in the restoration.
Of course, the fabric of the building must be fixed before anything else can be done.
Our forebears gave their “widows mites” for the building of the cathedral in the first place. Why not do it again, from all over the world.
Who would not want a small piece of these ancient and significant timbers?