[1] It came from combining the traditional four red stripes over a yellow field of the Senyera with a blue triangle at the hoist containing a five-pointed white star, inspired by the flags of Cuba, the Philippines and Puerto Rico.

It is a stamp commemorating the acquisition of the Pi de les Tres Branques (Three-Branched Pine) by the Catalanist Union.

), published in Santiago de Cuba by Catalan exiles - a publication that had already clearly proclaimed the independence of Catalonia.

During the late 1910s, once World War I was over, Europe saw a wave of new nation-states being created, with the assistance of President Woodrow Wilson.

One is in the last number of La Tralla ("The Whip", a radical separatist magazine from the 1920s), before the coup d'état by Miguel Primo de Rivera.

The other is in a document published by the Comitè Pro-Catalunya written in Catalan and Arabic, to greet and encourage one of the Moroccan leaders who revolted against Spain.

An estelada was owned by Francesc Macià during the failed invasion of Prats de Molló in 1926; it appeared between the imprisonment of the Catalan volunteers and their transfer to Paris to be put on trial.

Because this party wanted to make its own socialist and Marxist ideas clear, it decided to change the colour of the star to red; in 1969, this new version of the estelada started to appear at PSAN meetings.

[citation needed] The estelada is ubiquitous as a simplified symbol - four vertical bars topped by a star, sprayed or daubed on walls, lampposts or mailboxes all over Catalonia.

[citation needed] In 2016, the Spanish government prohibited football fans from bringing esteladas to the Copa del Rey final match between Barcelona and Sevilla, held in Madrid.

The government applied the article 2.1 of the Law on Sports, which prohibits the display of symbols that "incite, foment or help violent or terrorist behavior.

[4] The oldest extant document showing this Estrelada - with a red star - is a war poster of the Valencian Left.