The flag of Sicily was first adopted in 1282, after the successful Sicilian Vespers revolt against Charles I of Sicily. It is characterized by the presence of the triskelion (trinacria) in its middle, the (winged) head of Medusa and three wheat ears. The three bent legs allegedly represent the three points of the triangular shape of the island of Sicily itself. The present design became the official public flag of the Autonomous Region of Sicily on 4 January 2000, after the passing of an apposite law.
The flag is bisected diagonally into regions colored red and yellow, red representing the municipality of Palermo, yellow representing Corleone, which in medieval times was an agricultural city of renown. Palermo and Corleone were the first two cities to found a confederation against the Angevin rule.
The triskelion (or trisceli) is widely considered the actual symbol of Sicily. The symbol is also known as the trinacria, which is also an ancient name of Sicily.
The head in the center is the Medusa, whose hair was turned into snakes by the outraged goddess Athene. In their wisdom, the Sicilian parliament replaced the Medusa head with one that is less threatening to the innocent onlooker who, after all, should not be anticipating being turned to stone.