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 desecration
On 26 July 1935 in New York a group of demonstrators boarded the SS "Bremen", tore the Nazi party flag from the jackstaff and threw it into the Hudson River. The German ambassador sharply protested, but the protest was rejected, with the judgement that only a party symbol was harmed and the national flag was not affected. On 15 September 1935, in response to this incident, the "Reichsflaggengesetz" (Reichs flag law) (RGBl. I S. 1145) came into effect, declaring the Nazi flag to be the exclusive national flag of Germany and removing the status of the black-white-red tricolor flag of the German Empire as co-national flag.