Brazil's Flag has some very interesting history. First, the green and yellow represent the royal houses of Bragan├ža ca and Hasburg. the stars represent the sky over Rio De Janerio on the day the republic of Brazil was declared. Also, there are 27 stars for 26 states and the federal district. third, the republic was declared in 1889, when there was a temporary flag for 4 days. In conclusion, Brazil has a very interesting flag.