Flag of Germany
While the use of black-red-gold had been suggested in the Soviet zone in 1946, the Second People's Congress in 1948 decided to adopt the old black-white-red tricolour as a national flag for East Germany. This choice was based on the use of these colours by the National Committee for a Free Germany, a German anti-Nazi organisation that operated in the Soviet Union in the last two years of the war. In 1949, following a suggestion from Friedrich Ebert, Jr., the black-red-gold tricolour was instead selected as the flag of the German Democratic Republic upon the formation of this state on 7 October 1949. From 1949 to 1959, the flags of both West and East Germany were identical. On 1 October 1959, the East German government changed its flag with the addition of its coat of arms. In West Germany, these changes were seen as a deliberate attempt to divide the two Germanys. Displaying this flag in West Germany and West Berlin—where it became known as the (divider-flag)—was seen as a breach of the constitution and subsequently banned until the late 1960s.
Flag of Germany
Following the dissolution of the German Confederation, Prussia formed its unofficial successor, the North German Confederation, in 1866 with the signing of the Confederation Treaty in August 1866 and then the ratification of the Constitution of 1867. This coalition consisted of Prussia, the largest member state, and 21 other north German states.
The question regarding what flag should be adopted by the new confederation was first raised by the shipping sector and its desire to have an internationally recognisable identity. Virtually all international shipping that belonged to the confederation originated from either Prussia or the three former Hanseatic city-states of Bremen, Hamburg, and Lübeck. Based on this, Adolf Soetbeer, secretary of the Hamburg Chamber of Commerce, suggested in the on 22 September 1866 that any planned flag should combine the colours of Prussia (black and white) with the Hanseatic colours (red and white). In the following year, the constitution of the North German Confederation was enacted, where a horizontal black-white-red tricolour was declared to be both the civil and war ensign.