<human>:  When did Eastern Orthodox iconoclasm start?
<bot>: Eastern Orthodox iconoclasm started in the 8th century. The Eastern Orthodox Church split off from the Roman Catholic Church in the 11th century, and the two churches have had a long and bitter rivalry. The Eastern Orthodox Church still uses icons, but they are not allowed to be worshipped or venerated. Instead, they are meant to be used as visual aids to help worshipers remember the saints and martyrs of the church.