The modern-day flag of Brazil is adopted…
November 1889 CE
In 1815, Brazil had been elevated to the rank of kingdom, and the kingdoms of Portugal, Brazil and the Algarves were united as a single state—the United Kingdom of Portugal, Brazil and the Algarves.
The Charter Act of 1816 established the insignia of the new kingdom.
It specified that the arms of the Kingdom of Brazil was to be composed of a gold armillary sphere on a blue field.
During this time, the flag of Brazil was the flag of the United Kingdom of Portugal, Brazil, and the Algarves.
The imperial flag of Brazil was designed by Jean-Baptiste Debret as the Royal Standard of the Prince Royal of the United Kingdom of Portugal, Brazil and the Algarves, Pedro I.
After the Brazilian Declaration of Independence, and with the coronation of Pedro I as Emperor of Brazil, the Royal Standard was modified to become the flag of the Empire of Brazil.
The new flag featured the imperial coat of arms within a yellow rhombus, on a green field.
The green and yellow colors represents the dynastic houses of Pedro I and his consort Maria Leopoldina of Austria.
The imperial flag had been slightly modified during the reign of Pedro II, when an extra star was added to the imperial arms to conform to the new territorial organization of the country.
Upon the proclamation of the Republic, one of the civilian leaders of the movement, the lawyer Ruy Barbosa, proposed a design for the nation's new flag strongly inspired by the flag of the United States.
It was flown from November 15m 1889, until November 19, 1889, when Marshal Deodoro da Fonseca (acting as provisional president of Brazil) vetoed the design, citing concerns that it looked too similar to the flag of another state.
Fonseca suggested that the flag of the new republic should resemble the old imperial flag.
This was intended to underscore continuity of national unity during the transition from a constitutional monarchy to a republic.
Raimundo Teixeira Mendes presented a project in which the imperial coat of arms was replaced by a blue celestial globe and the positivist motto.
It was presented to Fonseca, who promptly accepted.
The flag was designed by a group formed by Raimundo Teixeira Mendes, Miguel Lemos, Manuel Pereira Reis and Décio Villares.
It is officially adopted on November 19, 1889,