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Constantine IV

c. 652 – 685 · b. Constantinople
emperor

Byzantine emperor (668-685). Convened the Third Council of Constantinople (680-681), the Sixth Ecumenical Council, which condemned Monothelitism and affirmed two wills in Christ.

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Common questions

Who was Constantine IV?
Constantine IV (652–685) — Byzantine emperor (668-685). Convened the Third Council of Constantinople (680-681), the Sixth Ecumenical Council, which condemned Monothelitism and affirmed two wills in Christ.
Who did Constantine IV correspond with?
Pope Agatho and Pope Leo II.

Sources for biography

  • Acta of the Third Council of Constantinople (681) primary
  • Theophanes, Chronographia AM 6160-6177 primary

documented connections(2)

  • corresponded (incoming) Pope Agatho
    Agatho's dogmatic letter to Emperor Constantine IV was read at the Third Council of Constantinople and accepted as the standard of dyothelite faith.
    Acta of the Third Council of Constantinople (681), Session 4
  • corresponded (incoming) Pope Leo II
    Leo II ratified the acts of the Third Council of Constantinople in correspondence with Constantine IV.
    Leo II, Epistula ad Constantinum imperatorem

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