A cuckold is the husband of an adulterous wife; the wife of an adulterous husband is a cuckquean. In biology, a cuckold is a male who unwittingly invests parental effort in juveniles who are not genetically his offspring. A husband who is aware of and tolerates his wife's infidelity is sometimes called a wittol or wittold.
c. 1815 French satire on cuckoldry, which shows both men and women wearing horns
A flag used in the English Civil War by Horatio Cary referring to the Earl of Essex's notorious marital problems
"The Cuckold Carpenter Under the Bed of his Wife and her Lover" from an 18th-century edition of the Kalīla wa-Dimna
A 15th-century Persian miniature
Adultery is extramarital sex that is considered objectionable on social, religious, moral, or legal grounds. Although the sexual activities that constitute adultery vary, as well as the social, religious, and legal consequences, the concept exists in many cultures and shares some similarities in Christianity, Judaism and Islam. Adultery is viewed by many jurisdictions as offensive to public morals, undermining the marriage relationship.
Public punishment of adulterers in Venice, 17th century
Susannah accused of adultery, by Antoine Coypel
Anne Boleyn was found guilty of adultery and treason and executed in 1536. There is controversy among historians as to whether she had actually committed adultery.
Le supplice des adultères, by Jules Arsène Garnier, showing two adulterers being punished