The rebellion flag
The flag of Belgium is composed of three vertical stripes of equal width, which are black, yellow and red. The colours of the flag are supposed to derive from the coat of arms of the Brabant province although they are present in the coat of arms of most of the country's provinces.
The flag was used for the first time in 1789, at the time of the revolt of the Belgian people against the Austrian-Hungarian domination. The stripes were and remained horizontal up to 1830. When the country was released from the Dutch dominion, the stripes became vertical, probably in memory of revolutionary days. It was officially adopted in its current form in 1831. The Constitution of Belgium mentions the colours, the arms and the motto of the country: “The Belgian nation adopts red, yellow and black colours, and as arms the Lion of the Belgium kingdom with the motto: union is strength”.
All this is very instructive, but provides no information about the choice and meaning of the three colours. Interestingly, these three colours have also been used for the coat of arms of the State ensign of Belgium. It represents a “sable” (black) lion, topped by an “or” (yellow) crown, with “gules” (red) claws and teeth. Now, it happens that these colours have a close relationship with the development of the country and the beings living in it.