Final answer:
The ultimate outcome of the Iconoclast Controversy was the restoration of the use of religious images in the Byzantine Empire.
Step-by-step explanation:
The ultimate outcome of the Iconoclast Controversy was the restoration of the use of religious images in the Byzantine Empire. The controversy began in the 8th century and lasted for several centuries, with periodic periods of iconoclasm where the use of religious images was prohibited. However, in the 9th century, the iconodules (supporters of religious images) gained the upper hand and the use of icons was officially allowed and even encouraged.
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