Many of the documents have not been preserved in any other collection and contemporary copies have not survived.
It was this text which was edited by O. Guenther, and published as Epistolae Imperatorum Pontificum Aliorum Inde ab a. CCCLXVII usque DLIII datae Avellana Quae Dicitur Collectio, in Corpus Scriptorum Ecclesiasticorum Latinorum, Vol.
[2] In 2010, the Avellana Project was launched, with a view to completing a systematic study of the documents.
The project was led by Dr. Alexander Evers, Assistant Professor of Classical Studies and Ancient History at Loyola University Chicago.
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