Let’s fix up Notre Dame with concrete and steel, but let the sun shine into it
Notre Dame, like nearly every French cathedral (and most English Gothic ones) is covered by a high stone vault that makes the roof completely invisible from the interior. At least part of the reason that they were commonly employed in Gothic architecture was to make sure that the interior, and all its furniture and fittings (not to mention people) were protected from the biggest fire hazard – the roof structure – from crashing down to the floor as soon as it set ablaze. Saddest of all, a load of spreadsheet architectural firms get free publicity by doing stupid renders where they put a swimming pool on top of the cathedral, or a glass roof to let light in, revealing that they don’t even seem to understand the concept of a vault.