Flag of Catalonia, proportions 2:3
The Catalan flag is said to be one of the oldest of the world. According to a 14th century legend, the flag dates back from the 9th century; but is more likely that it derives from 11th century or 12th century pre heraldical symbols.
The legend tells that the four red bars were drawn on Wilfred I the Hairy 's (Count of Barcelona) golden shield by the king Carles el Calb 's fingers drenched with the blood in the Count's war wounds.
See also
The Catalan flag at Flags of the World site