Notre Dame is not gone - it will just have a slow recovery. CNN has been showing a photo of the main altar as it is now ... the first thing I noticed was the bright cross still shining bright; time will be necessary, but the cathedral will return. Your photos are special, but the future will bring new chances for new photos.
My motto has always been "Take photos today before tomorrow comes and everything changes"
The cross was the first thing I noticed as well.