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 Scania
The "modern" Scanian cross flag was for a long period believed to have been created in the 1870s at the private initiative of the historical professor Martin Weibull. But this was later denied by his son, Curt Weibull, who instead gave this credit to his uncle, Mathias Weibull, who also was a historical professor. Curt Weibull also stated that the modern flag was created first in 1902. 
It's based his design on the Nordic tradition of cross flags. It combines the red field of the flag of Denmark with the yellow cross of the flag of Sweden, reflecting the troubled history of the region.