re: #70 lawhawk
Significant portions are stone, but if the fire is that intense, it could weaken the stone/mortar and cause displacement resulting in additional collapses - to say nothing of the collapsing roof might do on the walls and adjacent structures.
With a will, the degree of possible reconstruction and restoration is incredible. After a series of earthquakes brought down most of the Franciscan basilica in Assissi, bits of fresco the size of a little finger’s nail were collected and replaced. But you have to want it.