The Byzantine Iconoclasm was two periods in the history of the Byzantine Empire when the use of religious images or icons was opposed by religious and imperial authorities within the Ecumenical Patria
A simple cross: example of iconoclastic art in the Hagia Irene church in Istanbul
Byzantine Iconoclasm, Chludov Psalter, 9th century.
Argument about icons before the emperor, in the Skylitzis Chronicle
Patriarch Germanos I of Constantinople with icons supported by angels
Irene of Athens, surname Sarantapechaena, was Byzantine empress consort to Emperor Leo IV from 775 to 780, regent during the childhood of their son Constantine VI from 780 until 790, co-ruler from 792
Byzantine Iconoclasm
…of the Empire. Constantine's son, Leo IV (775–780), was less rigorous, and for a time tried to mediate between the factions. When he died, his wife Irene took power as regent for their son, Constantine VI (780–797). Though icon veneration does not seem to have been a major priority for the regency…
Solidus of Irene issued during her sole reign
Gold solidus showing Irene as regent along her son Constantine VI; Irene took control of the throne and ruled the empire solo until 790.
Irene of Athens (or Irene Doukaina) in the Pala d'Oro, Venice.
15th century mural depicting Irene and Constantine VI at the Seventh ecumenical council of 787.