A man holds a Catalan pro-independence 'Estelada' flag in Barcelona during a regionwide strike called by a pro-independence union.

A man holds a Catalan pro-independence 'Estelada' flag in Barcelona during a regionwide strike called by a pro-independence union.

People hold placards reading "Free political prisoners" and holding Catalan pro-independence 'Estelada' flags during a demonstration in Barcelona during a regionwide strike called by a pro-independence union.

A man plays the guitar next to people holding placards reading "Free political prisoners" during a demonstration outside the Generalitat Palace in Barcelona during a regionwide strike called by a pro-independence union.