The flag of Greece features nine horizontal stripes alternating between blue and white, symbolizing the waves of the Aegean Sea. The blue color represents the sky and sea, while the white signifies purity and the struggle for independence. In the upper hoist corner, there is a blue square with a white cross, which represents Greek Orthodoxy, the predominant religion in the country. The flag was officially adopted on December 22, 1822, during the Greek War of Independence. The design and colors of the flag reflect Greece's rich maritime history, cultural heritage, and national identity.