Iconoclasm is the social belief in the importance of the destruction of icons and other images or monuments, most frequently for religious or political reasons. People who engage in or support iconoclasm are called iconoclasts, a term that has come to be figuratively applied to any individual who challenges "cherished beliefs or venerated institutions on the grounds that they are erroneous or pernicious."

Epiphanius of Salamis was the bishop of Salamis, Cyprus, at the end of the 4th century. He is considered a saint and a Church Father by both the Eastern Orthodox and Catholic Churches. He gained a reputation as a strong defender of orthodoxy. He is best known for composing the Panarion, a compendium of eighty heresies, which included also pagan religions and philosophical systems. There has been much controversy over how many of the quotations attributed to him by the Byzantine Iconoclasts were actually by him. Regardless of this he was clearly strongly against some contemporary uses of images in the church.