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
In addition to the normal horizontal format, many public buildings in Germany use vertical flags. Most town halls fly their town flag together with the national flag in this way; many town flags in Germany exist only in vertical form. The proportions of these vertical flags are not specified. In 1996, a layout for the vertical version of the government flag was established, that co-incidentally matched the pattern of the "conventional" black-red-gold flag of the Principality of Reuss-Gera () from 1806–1918: the is displayed in the centre of the flag, overlapping with up to one fifth of the black and gold bands. When hung like a banner or draped, the black band should be on the left, as illustrated. When flown from a vertical flagpole, the black band must face the staff.