The iconoclast Council of Hieria was a Christian council of 754 which viewed itself as ecumenical, but was later rejected by the Second Council of Nicaea and by Catholic and Orthodox churches, since none of the five major patriarchs were represented in Hieria.
The Council of Hieria was summoned by the Byzantine, Eastern Roman Emperor Constantine V in 754 in the palace of Hieria opposite Constantinople. The council supported the emperor's iconoclast position in the Byzantine iconoclasm controversy, condemning the spiritual and liturgical use of iconography as heretical.
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