RT @MadelineOnMars@twitter.com
Notre Dame’s old stones will hold up, but I’m most worried about the rose windows. Here‘s the one at the southern end of the transept.
It dates from the year 1260. It’s twin on the northern end is even older, from 1250.
🐦🔗: https://twitter.com/MadelineOnMars/status/1117846883706126336