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What was the Iconoclastic Controversy in the Byzantine Empire?

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Hagia Sophia: mosaic — Byzantine Empire The Virgin Mary holding the Christ Child (centre), Justinian (left) holding a model of the Hagia Sophia, and Constantine (right) holding a model of the city of Constantinople; mosaic from the Hagia Sophia, 9th century.

The Iconoclastic Controversy was a protracted 8th- and 9th-century dispute within the Byzantine Empire regarding the religious use and veneration of icons (images of Christ and the saints).1

The Conflict

The debate centered on two opposing viewpoints:
* Iconoclasts: Those who rejected images, citing the Old Testament prohibition against idolatry in the Ten Commandments. They feared that venerating icons led to superstition and improper worship.12
* Iconodules: Defenders who argued that icons were symbolic representations and that the Incarnation justified the depiction of God in human form.12

Historical Timeline

726–730: Emperor Leo III publicly opposed icons and officially prohibited them in 730, initiating a period of persecution.13
787: Empress Irene convoked the Second Council of Nicaea, which condemned Iconoclasm and restored icon veneration.1
814–843: Iconoclasm was briefly reinstated under Leo V and his successors until Empress Theodora permanently restored the use of icons in 843, an event celebrated as the Feast of Orthodoxy.1

This controversy deeply divided the church and strained relations between the Byzantine Empire and the papacy in Rome, contributing to the long-term alienation between the Eastern and Western Christian worlds.2