Lunatic is a term referring to a person who is seen as mentally ill, dangerous, foolish, or crazy—conditions once attributed to "lunacy". The word derives from lunaticus meaning "of the moon" or "moonstruck".
A suffragist postcard depicting a lunatic, symbolized by a moon
The horoscope of a "Lunatic" according to an astrologer who describes how the positions of the planets Saturn and Mars with respect to the moon are the cause of "diseases of the mind".
The lunatic asylum, insane asylum or mental asylum was an institution where people with mental illness were confined. It was an early precursor of the modern psychiatric hospital.
Social alienation was one of the main themes in Francisco Goya's masterpieces, such as The Madhouse (above).
Eastern State Hospital was the first psychiatric institution to be founded in the United States.
Dr. Philippe Pinel at the Salpêtrière, 1795 by Tony Robert-Fleury. Pinel ordering the removal of chains from patients at the Paris asylum for insane women.
The joint counties' lunatic asylum, erected at Abergavenny, 1850