The '''Byzantine response to the [[autocephaly]] of the [[OCA]]''' consisted primarily in a number of letters and statements made in the early 1970s by the ancient autocephalous [[patriarchate]]s of the [[Orthodox Church]]—the Churches of [[Church of Constantinople|Constantinople]], [[Church of Alexandria|Alexandria]], [[Church of Antioch|Antioch]], and [[Church of Jerusalem|Jerusalem]]—along with the [[Church of Greece]]. Like most autocephalous Orthodox churches worldwide, the Byzantine churches rejected the grant of autocephaly by the [[Church of Russia]] to the American Metropolia (the former name of the OCA), and with the leadership of Patriarch [[Athenagoras I (Spyrou) of Constantinople]], issued various responses detailing canonical, historical and practical arguments against the grant.
The primary documents detailing these churches' response were published initially in the ''Orthodox Observer'', the official publication of the [[Greek Orthodox Archdiocese of America]], and published in 1972 in book form as ''Russian Autocephaly and Orthodoxy in America: An Appraisal with Decisions and Formal Opinions''. The book also includes an introductory essay by Archbishop [[Iakovos (Coucouzis) of America]], a ''Prolegomena'' Fr. Nicon D. Patrinacos, and an appendix by Metropolitan Emilianos, permanent representative of the [[Church of Constantinople|Ecumenical Patriarchate]] at the World Council of Churches. The authors of the responses of the Churches of Alexandria, Antioch, Jerusalem and Greece are Pope Nikolaos, Patr. Elias IV, Patr. Benedictos and Abp. Ieronymos, respectively, the [[primate]]s of their respective churches.
Most of the arguments detailed below are shared in the responses of all the churches and of the other essays included in the volume, but the Churches of Constantinople and Greece give the most detailed comments (pp. 30-44 and 53-67, respectively).