Northern Renaissance painter Matthias Grunewald depicts perhaps the most famous torture victim in all of history, Jesus Christ upon the Cross. We are very familiar with the cleaned-up versions of the Crucifixion, the calm, alabaster Jesus, hardly marked, a few drops of blood at His hands, His feet, His side. Here Grunewald shows us something closer to reality. Crucifixion was death by slow torture. The Romans were particular masters of it.
Moving on to modern times, this World War II poster starkly pronounces the difference between the Allies and the Axis. Implicit in this work is the assumption that good guys don't torture, only the evil do.