In 300, when the Persian emissary arrives on horseback, he displays a string of crowned skulls, which are otherwise unexplained. What is the meaning of this?
From what I remember, they are the skulls of Kings and Sovereigns that had refused to submit / 'offer Earth and Water' to Xerxes.
No man, Persian or Greek, no man threatens a messenger.
You bring the crowns and heads of conquered kings to my city steps.
You insult my queen.