October 1, 2023, Barcelona, Catalonia, Spain: Protesters hold placards for the independence of Catalonia on the sixth anniversary of the unilateral referendum in Catalonia in Plaza de Catalunya. Called by the Council of the Republic of Catalonia, hundreds of protesters followed the event on the sixth anniversary of the unilateral referendum in Catalonia on October 1, 2017. (Credit Image: © Paco Freire/SOPA Images via ZUMA Press Wire)