Four European ports: Porto, Bordeaux, Hamburg and Bilbao. They are all cities built on river banks. As is usual in port cities, people and cultures of different origins come together on their streets. To get an image of that diversity, we’ve had a look at the signs on their streets, shops and businesses. For one thing, because they’re a graphic mirror of each city’s own character and, for another, because they also show how globalisation is transforming and levelling the world out in graphics, icons and forms of writing.