The symbolism of the flag is explained as follows:
• The flag of Vatican City, consisting of a ground of white and yellow divided vertically into equal parts. The white part bears the seal of Vatican State, consisting of the tiara and cross-keys, with the inscription Stato della Città del Vatiacano. The crossed keys of gold and silver symbolize the keys of the kingdom of heaven promised to Saint Peter, with authority to bind and loose (Matthew 16:18-19).
• The triple crown (the tiara) represents "the three powers of the Supreme Pontiff: Sacred Orders, Jurisdiction and Magisterium", in other words: his functions as "supreme priest", "supreme pastor" and "supreme teacher".
• The gold cross surmounting the triple crowns symbolizes the crucifixion of Jesus.