During the second world war, the collection of the National Gallery had to be hidden in a mountain in Wales to prevent bomb damage. Its director, Kenneth Clark, eventually realised, however, that this was bad for morale, and so made a single but striking exception. Starting with Rembrandt’s ‘Portrait of Margaretha Trip’, which the gallery had just acquired, he ensured that each month one famous painting would be on display in an alcove at the top of the main staircase. ‘Picture of the Month’ proved tremendously popular, almost a pilgrimage site. In the time of Covid-19, the gallery is closed once more, but now the danger is not to paintings but to people. Obviously this has been partly remedied by the virtual tours offered by the gallery (and by many other collections), but wouldn’t it be nice to find a way of achieving some direct human contact? How about selling lottery tickets in which the winners — up to, say, six people who do not have to distance from one another — would be given a guided tour of the gallery by its learned director, Gabriele Finaldi? This could be live-streamed, so that watching millions could enjoy it.