In addition to the black and white of Prussia, the white and purple colours of the previous Hanseatic League have been added. When the Teutonic state was secularized in 1525 because the Duchy of Prussia, the black eagle on a white shield turned the Prussian coat of arms. For the reason that thirteenth century, a black cross on white coat had been carried by medieval Teutonic Knights which had founded the State of the Teutonic Order in Prussia. Both new states founded in 1949, the Federal Republ...