April 23 is Saint George’s Day, celebrated in particular by a number of countries and cities where Saint George is the patron saint. One of these is, of course, England, though here the celebrations tend to be quite muted and minimal, and certainly nothing in comparison to the merriment that heralds St Patrick’s Day. In Catalonia, however, it prompts a good deal more in the way of celebration, and I made this graphic for the Institute of Chemical Research of Catalonia to illustrate some of its facets.