Flag of GoiásThe flag of Goiás is the official flag of the Brazilian state of Goiás. The flag was adopted on 30 July 1919 by Law No. 650 of Goiás.HistoryThe flag was created by Joaquim Bonifácio de Siqueira and later adopted by Law No. 650 of Goiás during the governorship of.SymbolismThe color green represents the House of Braganza, the Portuguese royal family of Emperor Dom Pedro I. The color yellow represents the House of Habsburg, the Austrian family of Empress Maria Leopoldina of Austria, first wife of Dom Pedro I. And the five white stars in the upper left hoist represent the Southern Cross. The Southern Cross was the constellation that gave Brazil its primitive names, Ilha de Vera Cruz and Terra de Santa Cruz.