If cave people had already had flags: The banner of the Altamira tribe.
from /r/vexillology Top comment: I know, the people 20,000 years ago had no fabrics which were really suitable for making flags to fly from a pole or mast, but if they had, their flags would probably have been emblazoned with their totem animals. This bison is from a cave painting in Altamira, Cantabria, Spain.















