Today we all write by email and receiving a postcard or a letter with a stamp in the mailbox has become an experience more unique than rare. And when it happens, we immediately go to observe the stamp, because sometimes it is a real miniature of works of art or celebrates a very important historical event. The older ones will remember the stamps with the first man on the moon, or those for the centenary of the invention of the radio. Well, swimming was also often celebrated on stamps, especially at sporting events such as the world championships and the Olympics. And if there is a nice way to re-read the history of swimming … it is precisely this, through the stamps that tell it, tiny pictures of an immense encyclopedia. Here are some chapters.