Civilisation only ever hangs by a thread. Today one of those threads seems to have frayed, perhaps snapped. It is impossible to watch the footage coming out of Paris, all that can be done is to groan and turn away. It is not possible to watch the spire of Notre Dame collapse. It is not possible to watch the great cathedral consumed by fire.

Evelyn Waugh once said that in the event of a fire in his house, if he was able only to save his children or his library, he would save his library because books were irreplaceable. Only at a moment such as this is it possible to concede the slightest truth in that remark. Almost anything could be borne rather than the loss of this building.

There will be recriminations, of course. There will be disputes about budgets, and overtime and safety standards and much more. It is worth reading this piece from two years ago about the funding problems that existed around the cathedral’s restoration. But if Notre Dame can burn then all this is as nothing, because it tells us something too deep to bear. As I said a couple of years ago in a book, in some ways the future of civilisation in Europe will be decided by our attitude towards the great churches and other cultural buildings of our heritage standing in our midst. Do we contend with them, ignore them, engage with them or continue to revere them? Do we preserve them?

Though politicians may imagine that ages are judged on the minutiae of government policy, they are not. They are judged on what they leave behind: most of all on how they treat what the past has handed into their care. Even if today’s disaster was simply the most freakish of accidents, ours would still be the era that lost Notre Dame.

We would have to tell future generations what it was like, this treasure that we lost. At the start of this decade I was living part of each week in Paris, commuting back and forth to a little flat on the edge of Le Marais. Each time I headed out to the earliest Eurostar on a Monday morning I would see the great cathedral first as I turned into the street. One winter morning heavy snow was falling and as I headed to the station I stopped dead, alone in the street with the cathedral and just drinking in the sight of a building I had seen a hundred times before. When I got into London a friend could see I was just beaming still, radiating far too much joy for such a time of the week. He asked how I was and I remember simply saying, ‘This morning I saw Notre Dame in the snow’. It was like that.