Flag of Germany 3:5 figure. In 1804, Napoleon Bonaparte declared the First French Empire. In response to this, Holy Roman Emperor Francis II of the Habsburg dynasty declared his personal domain to be the Austrian Empire and became Francis I of Austria. Taking the colours of the banner of the Holy Roman Emperor, the flag of the Austrian Empire was black and gold. Francis II was the last Holy Roman Emperor, with Napoleon forcing the empire's dissolution in 1806. After this point, these colours continued to be used as the flag of Austria until 1918. The colours red and white were also significant
National flag it is wide, again except for the flag of Nepal. The flags of Switzerland and the Vatican City are the only national flags which are exact squares. The obverse and reverse of all national flags are either identical or mirrored, except for the flag of Paraguay and the partially recognized Sahrawi Arab Democratic Republic. See Flags whose reverse differs from the obverse for a list of exceptions including non-national flags. As of 2011, all national flags consist of at least two different colours. In many cases, the different colours are presented in either horizontal or vertical bands. It is particularly