The flag of Vatican City features two vertical bands of yellow and white with crossed keys and the Papal tiara.Yellow and white symbolize spiritual and temporal power, while the keys represent the authority of the Pope.
The National Flag of Vatican City

Vatican City Flag Facts
| Country | Vatican City |
| Capital | Vatican City |
| Currency | Euro (EUR) |
| Official Language | Latin, Italian |
| ISO Country Code | VAT |
| Adopted On | 7 June 1929 |
| Design By | Traditional papal design (no single designer) |
| National Day | 29 June (Feast of Saints Peter and Paul) |
| National Anthem | Pontifical Anthem (Papal Anthem) |
| Flag Ratio | 1:1 |
| Colors | Yellow, White |
| Design | Vertical bicolor with yellow on the hoist side and white on the fly side, featuring the papal tiara and crossed keys of Saint Peter |
| Center Symbol | Papal tiara and crossed keys |
| Meaning of Yellow | Spiritual power and the gold key of Heaven |
| Meaning of White | Purity and the silver key of Heaven |
| Symbolism of Crossed Keys | Authority given to Saint Peter and papal authority |
| Symbolism of Papal Tiara | The spiritual leadership of the Pope |
| Cultural Influence | Rooted in Roman Catholic tradition and papal history |
| Unique Feature | One of the only national flags with a square (1:1) ratio |
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