Flag of Portugal

Flag of Portugal. The national flag of the Portuguese Republic is a rectangular bicolour with a field vertically divided into green and red. At the junction of the two colours is the national coat of arms of Portugal, consisting of an armillary sphere and the traditional Portuguese shield. Adopted on 30 June 1911 following the 5 October 1910 revolution that established the republic, it replaced the flag of the Kingdom of Portugal. The flag's distinctive design and colours carry deep historical and political symbolism related to Portugal's maritime history and republican ideals.

History

The current flag was conceived in the aftermath of the 5 October 1910 revolution, which overthrew the Portuguese monarchy and ended the reign of Manuel II of Portugal. A government-appointed commission, which included prominent figures like painter Columbano Bordalo Pinheiro and journalist João Chagas, was tasked with creating new national symbols. The design was formally approved by the Portuguese Republican Party-dominated National Constituent Assembly and officially adopted by decree on 30 June 1911. This replaced the previous royal standard, which featured the blue and white coat of arms of Portugal on a rectangular field. The change was part of a broader effort to break from monarchist iconography, following similar symbolic shifts seen after the French Revolution and during the United States of Brazil.

Design and symbolism

The flag has an unusual aspect ratio of 2:3. The field is vertically divided, with green occupying two-fifths of the flag's length at the hoist and red the remaining three-fifths at the fly. Centred on the boundary between the colours is the national coat of arms of Portugal. The green is officially defined as "Portuguese green", symbolising hope for the future and a tribute to the navigator Henry the Navigator, who is often associated with the colour. The red, or "Portuguese red", represents the blood shed in defence of the nation, evoking historical conflicts like the Battle of Aljubarrota and the Portuguese Restoration War. The central coat of arms combines the ancient Portuguese shield—featuring five blue escutcheons each with five white bezants, representing the Battle of Ourique—and the armillary sphere, a navigational instrument emblematic of the Portuguese discoveries and the Age of Discovery led by figures such as Vasco da Gama and Ferdinand Magellan.

Protocol and use

The flag's use is regulated by law, and it must be displayed daily at public buildings including the Assembly of the Republic, the Belém Palace, and all municipalities of Portugal. It is hoisted on national holidays such as Portugal Day and the anniversary of the Carnation Revolution. The flag is also used as a naval ensign by the Portuguese Navy and is incorporated into the standards of the President of Portugal and the Prime Minister of Portugal. When flown with other flags, such as the Flag of Europe or municipal banners, it must occupy the position of honour. Desecration of the flag is a criminal offence under the Penal Code of Portugal.

Historical flags

Prior to 1911, Portugal used several royal banners. The flag of the Kingdom of Portugal (1830–1910) was a blue and white bi-colour with the royal coat of arms. Earlier, during the House of Aviz and the House of Braganza, flags often featured the Cross of the Order of Christ on a white field, particularly during the maritime explorations. The personal standard of John I of Portugal displayed a green cross, while the flag used during the Portuguese succession crisis of 1580 incorporated the heraldry of Philip II of Spain. The Liberal Wars also saw distinct flags used by the factions of Miguel I of Portugal and Pedro IV of Portugal.

Similar flags

The colour scheme of green and red is shared with the national flag of Italy, though the Italian flag is a vertical tricolour. The flag of the Republic of Ireland is also a green, white, and orange tricolour, but with a different arrangement and symbolism. Some subnational flags, like that of the Autonomous Region of Madeira, incorporate the same colours and the Cross of the Order of Christ in homage to Portugal's history. The flag of Brazil features a green field and a yellow rhombus, colours inspired by the House of Braganza and House of Habsburg, and also includes an armillary sphere in its central emblem, reflecting its historical ties to the Portuguese Empire.