My holidays have begun and I’m going to spend some days in London and in South England. I’ve been in Canterbury in my first day in England and therefore my mathematical tourism has also begun in this beautiful city. Canterbury is very famous because Geoffrey Chaucer (c.1343-1400) included its name in his famous Canterbury Tales and also because of its great cathedral. The building is wonderful and you can see some royal tombs (Henry IV and his wife Joan of Navarre) inside. For our mathematical aim, we can see the beautiful mosaics in the centre of the cathedral:
They are very beautiful, aren’t they? Do you remember the Sierpinski triangle?