What is the story behind the ancient Greece symbol of power?

What did Leonardo da Vinci write in his mirror writing? Why did the Jewish keep their faith of the holocaust? What year was the Constitution officially ratified? What were the underground networks of communication and propaganda established by Samuel Adams that sustained colonial resistance called? Why did indyMac bank fail? What jobs are in shanty towns? What does blind alleys mean in world war 1? How did the conspirators assassinate Julius Caesar? What did native Americans hope to gain in return for agreeing to stay in one place? When was the first 1 GHz CPU released? How many alabamians lost their lives in Vietnam? Did Sammy Sosa had any problems? What are some names for the war that freed the colonies from British rule? The was the Maginot line? What worker was beneath the peasant in medieval hierarchy? Where did Christopher Columbus want to land? Who is a Cuban national hero? When was the last time the Pittsburgh Steelers lost in 2013? What was the major result of consumer overconfidence in the economy in 1920? What team did reggie Jackson hit the most homeruns for?

What is the story behind the ancient Greece symbol of power?