I was more awed by Stonehenge than Notre Dame. There's just something mystical about it and it's also much more ancient. Notre Dame was another cool cathedral. It's famous but Europe has many.

Either way sounds like an amazing rebuilding effort with many great passionate craftsman working on it. It goes to show that when we want to we can get stuff done. It's like a hackathon in a big company. Let's take from that and do more great things.