As an expert in cultural and historical symbols, I can provide you with a detailed explanation of the Catalan flag.

The Catalan flag, known as the Senyera, is a symbol of the Catalan nation and the Catalan-speaking territories. It consists of two red stripes on either side with a yellow stripe in the middle, which is slightly thicker than the red ones. The yellow stripe is also charged with the coat of arms of Catalonia.

The red and yellow colors are believed to have been chosen by Wilfred the Hairy, the Count of Barcelona, who reportedly used the colors from the gold and red cloths he had tied to his arm during a battle. The coat of arms features a red striped shield with the Cross of Saint George, a white stripe with three red pomegranate seeds, and a royal crown above.

The flag is a symbol of Catalan identity and has been used historically during times when Catalonia sought greater autonomy or independence from the rest of Spain. It is often seen during political demonstrations and cultural events.

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The Senyera (Eastern Catalan: [s???e??], Western Catalan: [se??e?a]; meaning "pennon", "standard", "banner", "ensign", or, more generically, "flag" in Catalan) is a vexillological symbol based on the coat of arms of the Crown of Aragon, which consists of four red stripes on a yellow field.read more >>