A prisoner of conscience (POC) is anyone imprisoned because of their race, sexual orientation, religion, or political views. The term also refers to those who have been imprisoned or persecuted for the nonviolent expression of their conscientiously held beliefs.
Most often associated with the human rights organisation Amnesty International, the term was coined by that organisation's founder Peter Benenson in a 28 May 1961 article ("The Forgotten Prisoners") for London newspaper The Observer.