File:Flag of Germany (state).svg - Wikipedia

File:Flag of German Empire (merchant+cross).svg - Wikipedia

File:Flag of the Autonomous Province of Korçë.svg - Wikimedia

File:Flag of Burgenland (state).svg - Wikimedia Commons

File:Flag of the President of East Germany (1955–1960).svg - Wikipedia

File:Flag of Russia (Empire Total War).svg - Wikipedia, russia

File:Flag of the Union of Upper Silesians (1920-1924).svg

File:Flag of the German Confederation (war).svg - Wikipedia

File:Flag of Germany (construction sheet).svg - Wikipedia

Image:Flag of Finland (bordered).svg - Wikipedia, the free

Category:Current national flag, Vexillology Wiki

Category:Flags, OverSimplified Wiki

What did the Prussia flag look like? - Quora

File:Flag of Germany (1867–1918).svg - Wikipedia