Work dossier · summary and historical context
The Epistula synodalis of Amphilochius of Iconium is a Greek letter from circa 375–377 CE, preserved only in a single tenth-century manuscript (Vaticanus graecus 1431) within a collection of conciliar acts. It was composed after the death of Meletius of Antioch (381 CE) and was later cited at the Council of Ephesus (431 CE) as a patristic witness for Nicene orthodoxy. The letter defends the sufficiency of the Nicene Creed for the doctrine of the Holy Spirit, addressing debates that intensified in the 370s. Its prescript and closing are lost, leaving the addressee unnamed, though tradition assigns it to the bishops of Lycaonia. No critical edition exists; the present edition relies on a nineteenth-century transcription.
The Epistula synodalis is a rare direct witness to fourth-century conciliar correspondence and the development of Trinitarian doctrine, particularly the Spirit's divinity. It demonstrates how the Nicene Creed was invoked as a sufficient authority for later debates, and its citation at Ephesus shows its enduring authority in orthodox polemic. The letter also highlights Amphilochius's ecclesiastical leadership and the network of bishops in Asia Minor.
The letter dates to the period 375–377 CE, shortly after the death of Meletius of Antioch (381 CE) and during the Council of Constantinople (382 CE), where Amphilochius presided. It was written in Greek, likely in Iconium (modern Konya, Turkey), for a community of bishops in Lycaonia. The sole witness is Vaticanus graecus 1431 (10th century), which preserves the letter in a collection of conciliar acts, indicating its use in later ecclesiastical debates. The letter was included in the acts of the Council of Ephesus (431 CE) as a patristic testimony for the Nicene faith, cited by Cyril of Alexandria against Nestorius. Its transmission is fragmentary: the prescript and closing are lost, and no critical edition exists. The text reflects the post-Nicene controversy over the Holy Spirit's divinity, a key issue in the 370s, and aligns with Amphilochius's role as a defender of Nicene orthodoxy.
Apparatus · what the pipeline recorded
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