Seen actually BEFORE The Middle Ages, Semiotics was the practice of communication with pictures only. It was assumed (with different languages) – that basic common ideas are shared “universally”. Revisited in Medieval times, an example could be a “Rat Catcher” would would announce his “vocation” by posting or carrying a small sign portraying several dead rats. Another, might be a picture of a Pig or Boar Head (to convey a Butcher Shop). A Cow (or portion of Cheese) may announce “Dairy Goods”. The practice of Semiotic was especially useful in large Seaside or Harbor Ports were trade was brisk. Many Traders and the like may or may not have spoke the language of “The Port”. Such examples there would be a “tankard” for an Inn or even a plate of food could be use. Semiotic has actually thrived into the Modern Age, (internationally) – with the “Handicapped Wheelchair” image, a crossed out cigarette “No Smoking”, to a host of International and National driving and road signs.