The four bars derived on the flag of Catalonia appears on a seal by Ramon Berenguer IV in 1150, although its mythological origin is also linked to Wilfred the Hairy when, after a battle, Frank King Charles the Bald wiped his fingers in the blood of the nobleman and drew four red bars on his golden shield as an emblem. This set was different from the Counts of Barcelona and, while in some eras the lines were drawn horizontally, they ended up being vertical, which is made official in the Statute of Autonomy of 1979.
Els Segadors was declared the Catalan national anthem by an Act of the Catalan Parliament in 1993. Based on a popular idyll from the 17th Century, which had been collected by linguist and writer Manuel Milą i Fontanals, the current lyrics are by Emili Guanyavents, who won a competition in 1899 for this purpose by the Catalanist Union, motivating passionate polemics. The music was put to it in 1892 by Francesc Alió, who adapted the melody of an already existing song. The Anthem makes a reference to the blood-stained Corpus Cristi, the movement that took place in Barcelona on June, 7th, 1640 and which led to the War of the Segadors, the struggle of the Catalans and the troops of Felip IV. In the text, we can note illusions to the countrymen, the land and to freedom.
The National Day of Catalonia is celebrated on September, 11th and on this day, the Catalan people remember the loss of Catalan freedom and institutions due to the defeat in the War of Succession in 1714. With this commemoration, the desire to conserve the Catalan identity is remembered. When Franco's dictatorship fell, there were great demonstrations for independence on September, 11th. Nowadays, the Diada is the National Day of Catalonia through an Act of Parliament.