A Maya King who reigned from 682-734 CE. Here’s a portrait of him “with headdress and cloak of quetzal feathers”.
by Terry Rutledge
That’s a rendering of this portrait:
Via @archaeologyart who note that “Knowledge of quetzal ecology was required to obtain the feathers.”
Khan Academy has a lot more information on the king and the stela.
I know painfully little about Maya history and must amend this somehow.