After fighting the Spanish State with the terrorist group Iberian Liberation Movement in the early 1970s, he was convicted and executed for the death of a policeman during a shoot out.
Catalonians viewed Puig Antich's judicial death as symbolic retribution for the region's fight for self-government, and his name became commonplace in Barcelona.
The incident inspired works by Catalan artists Joan Miró and Antoni Tà pies, and a satirical play by the Catalan theater group Els Joglars.
The 2006 film Salvador depicts Puig Antich's time on death row.
After the Spanish Supreme Court declined an effort to review the execution, an Argentine court adopted the case under universal jurisdiction in 2013.