Iconoclasm is the deliberate destruction within a culture of the culture's own religious icons and other symbols or monuments, usually for religious or political motives. People who engage in or support iconoclasm are called iconoclasts. Conversely, people who revere or venerate religious images are called iconodules.
In Christianity, iconoclasm has generally been motivated by a literal interpretation of the Ten Commandments, which forbid the making and worshipping of "graven images". The two Byzantine outbreaks of iconoclasm during the 8th and 9th centuries were unusual in that the use of images was the main issue in the dispute, rather than a by-product of wider concerns.
As with other doctrinal issues in the Byzantine period, the controversy was by no means restricted to the clergy, or to arguments from theology. The continuing cultural confrontation with, and military threat from, Islam probably had a bearing on the attitudes of both sides. Iconoclasm seems to have been supported by many from the East of the Empire, and refugees from the provinces taken over by the Muslims. It has been suggested that their strength in the army at the start of the period, and the growing influence of Balkan forces in the army (generally considered to lack strong iconoclast feelings) over the period may have been important factors in both beginning and ending imperial support for iconoclasm.