How old is Heraldry?
Heraldry dates way back to the Middle Ages. In fact, you could say it goes back to the date of the Norman conquest when the new regime is established and a new order is imposed upon the country. You started to get knights and aristocrats taking over land and wanting to establish themselves as the dominant force, supplanting the old Anglo-Saxon aristocracy. This is really where you start to get this whole proof of where you've descended from.