Flag of Sicily Autonomous Region of Sicily on 4 January 2000, after the passing of an apposite law which advocates its use on public buildings, schools, city halls, and all the other places in which Sicily is represented. 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. Today, the triskelion (or "trisceli") is also widely considered the actual symbol of Sicily. The symbol is also known
Sicily in 552. In 535, Emperor Justinian I made Sicily a Byzantine province and, as in Roman times, Greek continued to be the predominate language spoken on the island. After the advent of Islam, Sicily was invaded by the Arab forces of Caliph Uthman in 652, but the Arabs failed to make any permanent gains and returned to Syria after gathering some booty. Raids seeking loot continued until the mid-8th century. Byzantine Emperor Constans II decided to move from the capital Constantinople to Syracuse in Sicily during 660. The following year, he launched an assault from Sicily against the Lombard Duchy