Flag of Vatican City Round Clock

Flag of Vatican City. The flag of Vatican City is the national flag of Vatican City. It was adopted in 1929, the year Pope Pius XI signed the Lateran Treaty with Italy, creating the new independent state of Vatican City. The flag is a vertical bi-colour of yellow and white, with the white half charged with the emblem of the Holy See (a papal tiara and the crossed keys of Saint Peter). It was modelled after the 1808 flag of the Papal States, a yellow-and-white bi-colour defaced with the tiara and keys in the centre. It is one of only two national flags that use a 1:1 aspect ratio, along with the flag of Switzerland. This is the version of the flag since 2023.