Iconoclasm

Iconoclasm (Greek: Εἰκονοκλασία, Eikonoklasia) is the term given to the period between 726 and 843 in the Byzantine Empire during which religious images (icons) were banned and destroyed. Although this movement appeared fundamentally as a religious reform, it was a complex process closely tied to the political, military, social, and economic challenges of the time. This approximately 120-year period is studied in two main phases, separated by interruptions.

Those who supported iconoclasm were called “iconoclasts” (image-breakers), while those who opposed the movement and defended icons were termed “iconophiles” (image-lovers) or “iconodules” (image-venerators).

The Triumph of Orthodoxy with the Glorious Return of Icons (Generated by Artificial Intelligence)

Terminology

The Concept of the Icon

The term “icon” derives from the Greek word “eikon” (εἰκών), meaning “image” or “representation.” It generally refers to religious images in the Orthodox Christian tradition, painted on wooden panels, walls, or other materials. These images typically depict Jesus Christ, the Virgin Mary, saints, martyrs, and scenes from the Bible. In Orthodox belief, icons are more than works of art; they are integral to worship and are believed to serve as spiritual gateways to the holy figures they represent.

Icons vary according to the materials used in their creation. Many materials such as wood, fabric, copper, stone, marble, and ivory were employed, but the most common type consists of portable wooden panels. They are divided into two main categories based on their purpose:

• Didactic Icons: These depict subjects from the Old Testament, the Gospels, and the lives of the Virgin Mary and saints. They are not intended for worship but serve an educational function, teaching religious stories to the largely illiterate population.

• Worship Icons: These depict only holy figures and possess their own theological significance. They are placed on the iconostasis in Orthodox churches as elements of liturgical practice. Some of these icons are believed to be “acheiropoietos” — not made by human hands — and are thought to possess miraculous powers.

The Concept of Iconoclasm

Iconoclasm is formed from the Greek words “eikon” (image) and “klao” (to break). The term describes the movement to prohibit and systematically destroy religious images and sculptures. This movement was adopted and implemented as state policy by specific Byzantine emperors during certain periods of history.

Historical Background and Causes

The emergence of iconoclasm cannot be attributed to a single cause; it was a multi-layered phenomenon rooted in the political instability, religious debates, social and economic pressures, and external influences of the era.

Political and Military Situation

The period preceding iconoclasm was marked by political chaos in the Byzantine Empire. Beginning with the deposition of Emperor Justinian II of the Heraclian dynasty in 695, a period of roughly twenty years saw constant military revolts and struggles for the throne. During this time, the empire faced threats from Arab armies in the east and Slavic and Bulgar groups in the Balkans, losing significant territories such as North Africa. Although Emperor Leo III, who ascended the throne in 717, restored some stability, the empire remained in a difficult military and political situation.

Religious, Social, and Economic Environment

During the 6th and 7th centuries, a form of veneration for icons and holy relics had developed in Byzantine society to the point of near-worship. There was widespread belief that icons could heal the sick, bring victory in battle, and protect cities. This practice was viewed by some clergy and emperors as a deviation from the essence of Christianity and a revival of paganism.

At the same time, monasteries and monks had gained considerable influence in society. Monasteries acquired vast lands through donations and were exempt from taxation, making them wealthier than the state. This situation reduced state revenues. Moreover, the migration of young people to monasteries created shortages in the labor force needed for military service and agriculture. The growing spiritual and social power of monks was perceived as a threat to imperial authority.

Causes of Iconoclasm

The fundamental causes of the iconoclastic movement can be grouped under the following headings:

Religious Causes

The most important theological basis for iconoclasts was the Second Commandment of the Bible, which prohibits the making of graven images. The excessive veneration of icons was widely seen by emperors and some clergy as a form of idolatry. Furthermore, the strict prohibitions against imagery in Islam and Judaism, along with accusations from their adherents that Christians were practicing idolatry, strengthened iconoclastic thought. The edict issued by Caliph Yazid II in 721 banning Christian images in his territories may have influenced Leo III’s adoption of a similar policy.

Political and Military Causes

Emperors sought to reassert their weakening central authority against the rising power of monasteries and the cult of icons. Iconoclasm was used as a tool to demonstrate imperial supremacy over the Church and to break the political and economic power of monasteries that threatened the state. Additionally, military defeats against the Arabs were interpreted as divine punishment for the sin of icon veneration, providing further justification for anti-image policies.

Natural Disasters

The massive volcanic eruption on the island of Thera (Santorini) in the Aegean Sea in 726 was interpreted by Emperor Leo III as a sign of God’s anger against the veneration of icons and a divine warning. This event played a triggering role in the onset of iconoclasm.

Periods of Iconoclasm

The iconoclastic movement is studied in two main phases, separated by interruptions.

First Iconoclastic Period (726–787)

The movement effectively began in 726 when Emperor Leo III (717–741) publicly criticized the cult of images and removed the icon of Christ from the Chalke Gate, the main entrance to the imperial palace. This act sparked revolts in the capital and other regions of the empire. In 730, Leo III deposed Patriarch Germanos and appointed Anastasios, an iconoclast, in his place, issuing an official edict banning images.

The most intense phase of the movement occurred during the reign of Leo III’s son, Constantine V (741–775). Constantine V convened a council at Hieria (modern Fenerbahçe) in 754 to establish a theological foundation for iconoclasm. Although representatives of the Papacy and other Eastern patriarchates were absent, the council condemned the veneration of icons and excommunicated clergy who supported them. During this period, iconoclastic policies targeted not only icons but also the cults of saints and the Virgin Mary, holy relics, and especially monks. Monasteries were seized and converted into public buildings, and monks suffered severe persecution and torture.

Persecutions eased during the reign of Constantine V’s son, Leo IV (775–780). Upon Leo IV’s death in 780, his widow Empress Irene pursued a pro-icon policy. In 787, Irene convened the Seventh Ecumenical Council in Nicaea, restoring the veneration of icons and nullifying the decisions of the 754 Council of Hieria. Thus, the First Iconoclastic Period ended.

Second Iconoclastic Period (815–843)

After the period of restored icon veneration, Emperor Leo V (813–820), who ascended the throne in 813, revived iconoclasm. Leo V cited the military successes of previous iconoclast emperors and believed that the empire’s victories were made possible by anti-image policies. In 815, he convened a synod at Hagia Sophia, rejecting the decisions of the 787 Council of Nicaea and initiating the Second Iconoclastic Period. Although this phase began more moderately than the first, prominent iconophiles such as Patriarch Nikephoros and Theodoros, abbot of the Studios Monastery, were exiled.

Leo V’s successor, Michael II (820–829), although himself an iconoclast, adopted a more conciliatory policy and banned further debates on icons. However, under his son Theophilos (829–842), persecution intensified. Influenced by his tutor, Patriarch John Grammaticus, Theophilos imposed harsh penalties on supporters of images.

The second and final Iconoclastic Period ended with Theophilos’s death in 842. Due to the minority of his son Michael III, his widow Empress Theodora assumed the regency and convened a synod in 843 that definitively restored the veneration of icons. This event, celebrated by the Orthodox Church as the “Triumph of Orthodoxy,” has been commemorated annually ever since.

Impact on Art and Architecture

Iconoclasm left lasting marks on Byzantine art and architecture.

• Religious Art: During this period, much of the figural mosaics and frescoes in churches and monasteries were destroyed or covered with plaster. In place of the removed images, large crosses, vegetal and geometric patterns (vines, animals, flowers) were commonly used. The large mosaic cross in the apse of the Church of Aya İrini in Istanbul is the best-known surviving example from this era. Similarly, in Hagia Sophia, figural images were replaced by crosses or preserved as non-figural decorations.

• Secular Art: The ban on religious imagery encouraged emperors to promote secular art in palaces and other civil buildings. Palaces constructed during the reigns of Constantine V and especially Theophilos featured secular subjects such as hunting scenes, chariot races, and imperial portraits, alongside motifs inspired by Sasanian and Abbasid court art. This development laid the groundwork for the revival of ancient Hellenistic artistic traditions and helped establish the foundations of the later “Macedonian Renaissance.”

Consequences and Legacy

The Iconoclastic Period left profound effects on the history of the Byzantine Empire and the Christian world:

• Separation of Eastern and Western Churches: Iconoclasm played a decisive role in the breakdown of relations between the Papacy and Byzantium. The Pope opposed the iconoclast emperors and drew closer to the Franks in the West. As a result, the Papal State was established, and in 800, Charlemagne was crowned emperor by the Pope, giving rise to a new Christian empire independent of Rome in the West. This event weakened Byzantium’s claim to be the sole heir of the universal Roman legacy.

• Strengthening of Orthodox Identity: The iconoclastic debates led to the theological grounding of the cult of icons and the development of “iconology.” Icons became an inseparable part of Orthodox belief and a symbol of “true faith.” The end of iconoclasm in 843 was celebrated as the Church’s victory over imperial authority.

• Changes in Byzantine State Structure: Iconoclast emperors temporarily strengthened the state’s economic and military structure by curbing monastic power and confiscating their wealth. Tax reforms were implemented and central authority was reinforced. However, these policies caused deep divisions within society.

In conclusion, iconoclasm brought lasting changes to the religious, political, and cultural life of Byzantium, severed its ties with the West, and played a central role in shaping Orthodox identity.