The document discusses the flags of Italy - the national flag and the flag of the Italian navy. The national flag, known as the Tricolore, was officially adopted in 1919 and features three vertical stripes of green, white, and red that represent the countryside, mountains, and blood spilled during Italian unification. The flag of the Italian navy features a shield in the middle divided into four squares representing the maritime republics of Venice, Genoa, Amalfi, and Pisa.