Assertion: council | /r/HasProperty | attended by 338 bishops
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Source sentences:
text: The Council of Hieria of 754, held at the imperial palace of that name close to Chalcedon in Anatolia, was summoned by Byzantine Emperor Constantine V and was attended by 338 bishops, who regarded it as the seventh ecumenical council The Second Council of Nicaea, which annulled that of Hieria, was itself annulled at a synod held in 815 in Constantinople under Emperor Leo