The flag of Rio de Janeiro is the official flag of the Brazilian state of Rio de Janeiro.ALVES. Derly Halfeld. Bandeiras: nacional, históricas e estaduais. Brasília. Edições do Senado Federal, 2011. ISBN 978-85-7018-358-3.
History
The flag was officially instituted by State Law No. 5588 of 5 October 1965, and was unchanged following the state's merger with Guanabara a decade later.
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References