Typically when there is such an important historical building being renovated, there should be a fire watch. A fire watch is a person who walks around the work site, usually when normal work is completed for the day and most workers leave the work site. It is this person’s duty to look for any fire and quickly report it and try to extinguish it if possible.
Question? Was there a fire watch? A fire watch is a person who’s job is to constantly examine the premises looking out for any fire possibility.
When in the Navy, we had a fire watch every night when the sailors were sleeping. Our barracks were wood structures which really necessitated this precaution.
Reference: What is a fire watch in the military?