The flag of Ancient Greece in general featured symbols like laurel wreaths or olive branches representing peace but assorted

https://mag-wiki.win/index.php/Why_the_American_Flag%27s_Design_Matters:_Exploring_Its_Symbols

The flag of Ancient Greece quite often featured symbols like laurel wreaths or olive branches representing peace yet different particularly amongst urban-states, reflecting their exceptional identities and values in classical antiquity.