THE VAULT HELD!!! the fire stayed ABOVE it!! Only a small part of the vault collapsed. The interior seems to be relatively untouched.
Apparently the great rose window is intact, though the two smaller ones (the north and south windows) are probably gone.
French reporter who was allowed into Notre Dame de Paris with President Macron on a brief 5-7 minute tour is saying the inside is largely preserved, with the Altar and the walls intact, even the rows of chairs still in place. There is a massive hole in the roof obviously. The Crown of Thorns and the Cloak of Saint Louis had been removed previously safe.