This video discusses how the 2019 fire that almost destroyed Notre-dam "saved" it. In addition to all the interesting things the restoration taught us about the building, it evidently also provided the impetus to actually do something about a neglected, aging building that was waiting to collapse.
There have been some really cool engineering techniques and facts uncovered by the restoration. The use of metal staples to help hold walls together and aid the buttresses is one of them. Lots of neat archaeological discoveries and random "who was tossed into this corner and never moved to a better resting place" kind of stuff. Additionally, it seems to have uncovered significant deferred maintenance.
Previously:
• Notre-Dame prepares to reopen five years after fire that nearly destroyed it
• How the restoration of Notre Dame de Paris is going
• Notre Dame scaffolding workers were smoking on the job before fire, firm says
