The flag of the Holy See, also known as the Vatican flag, features two vertical bands: the hoist side is yellow and the fly side is white. Centered on the white band is the crossed keys of Saint Peter, which symbolize the keys to heaven, and a Papal Tiara. The keys are gold and silver, representing the power of the Pope to bind and loose. The flag's design reflects the religious and historical significance of the Holy See, emphasizing its role as the spiritual and administrative center of the Catholic Church. The flag was officially adopted on June 7, 1929, following the Lateran Treaty that recognized the sovereignty of Vatican City. The colors yellow and white are also associated with the papacy, symbolizing spiritual light and the divine.