Flag of Germany
When Heinrich XI, Prince Reuss of Greiz was appointed by Joseph II, Holy Roman Emperor to rule the then-new Principality of Reuss-Greiz on 12 May 1778, the flag adopted by the "Fürstentum Reuß-Greiz" was the first-ever appearance of the black-red-gold tricolour in its modern arrangement in any sovereign state within what today comprises Germany – the Reuss elder line that ruled the principality used a flag whose proportions were close to a "nearly square"-shape 4:5 hoist/fly ratio, instead of the modern German flag's 3:5 figure.
Flag of Germany
The gold-red-black flag of the Jena featured prominently at this Wartburg festival. Therefore, the colours black, red, and gold eventually became symbolic of this desire for a unified German state. Austria, in its determination to maintain the status quo, enacted the Carlsbad Decrees of 1819 that banned all student organisations, officially putting an end to the .
In May 1832, around 30,000 people demonstrated at the Hambach Festival for freedom, unity, and civil rights. The colours black, red, and gold had become a well established symbol for the liberal, democratic and republican movement within the German states since the Wartburg Festival, and flags in these colours were flown en masse at the Hambach Festival. While contemporary illustrations showed prominent use of a gold-red-black tricolour (an upside-down version of the modern German flag), surviving flags from the event were in black-red-gold. Such an example is the , the flag flown from Hambach Castle during the festival: a black-red-gold tricolour where the red band contains the inscription (Germany's rebirth). This flag is now on permanent display at the castle.