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 England, but another is Catalonia. Like last year, I’ve worked with the Institute of Chemical Research of Catalonia and illustrator Miriam Rivera to produce a graphic looking at aspects of their celebrations.
Catalonia’s celebrations actually have similarities with Valentine’s Day, but as well as exchanging roses, lovers exchange books. The graphic draws on two previous Compound Interest graphics on these subjects; you can find the one on blood here, and the one on the chemistry of writing inks here.
The graphic is also available in Catalan: