Flag of San Marino. | San Marino claims to be the oldest surviving sovereign state and constitutional republic in the world, as the continuation of the monastic community founded on 3 September 301, by stonecutter Marinus of Arba. Legend has it that Marinus left Rab, then the Roman colony of Arba, in 257 when the future emperor, Diocletian, issued a decree calling for the reconstruction of the city walls of Rimini, which had been destroyed by Liburnian pirates.
"An eagle with a snake in its mouth recognizes the Aztec heritage of Mexico. According to Aztec legend, the gods advised the Aztec people to build their capital on the location in which they saw an eagle, perched on a prickly pear tree, eating a serpent. They built their capital, Tenochtitlan, on what is now the main plaza of Mexico City."
This is the current flag of Cambodia. It was made in 1948 after gaining their indepence. The Angkor Wat in the center is a symbol of integrity, the blue symbolizes liberty, and the red symbolizes bravery.