Moravia – Flag in Lexicon and Shop https://www.flaggenlexikon.de/foestmae_me.htm
The Margraviate of Moravia existed from 1849 to 1918 as an Austrian crown land. Its flag showed the colors gold and red.
Margraviate of Moravia, Source, by: Ströhl, Wappenrolle Österreich-Ungarns