https://en.wikipedia.org/wiki/Flag_of_Prussia
WebFlags. The Prussian national and merchant flag was originally a simple black-white-black flag issued on May 22, 1818, but this was replaced on March 12, 1823, with a new flag. The revised one (3:5) was parted black, white, and black (1:4:1), showing in the white stripe the eagle with a blue orb bound in gold and a scepter ending in another eagle. On its breast …