Carabanchel Prison was constructed by political prisoners after the Spanish Civil War between 1940 and 1944 in the Madrid neighbourhood of Carabanchel. It was one of the biggest prisons in Europe until its closure in 1998. The structure followed the panopticon model devised by Jeremy Bentham in 1785.

Marcelino Camacho Abad was a Spanish trade unionist and politician. He was a founding member of Comisiones Obreras (CCOO) and its first Secretary-General, holding this position between 1976 and 1987, and a communist deputy for Madrid Province between 1977 and 1981.