a ruler with total power over a country, typically one who has obtained power by force.
In 1973, Augusto Pinochet with the Chilean Armed Forces and the secret aid of the CIA, stormed into the Parliamentary Palace, La Moneda in Santiago, and overthrew President Allende. This Dictator maintained power until 1990, instigating 17 years of torture (as many as 30,000 people) and implementing economic liberalisation.
Disturbing right? But where does Valparaiso fit into this picture? And what has this got to do with graffiti?