Epistulae imperatorum pontificum aliorum inde ab a. CCCLXVII usque ad a. DLIII datae Avellana quae dicitur collectio

This edition of the so-called ''Collectio Avellana'' was published in two volumes with a Latin commentary by the German scholar Otto Guenther (18641924) in 18958. The collection consists of 244 documents dating from 367 to 553 including many imperial and papal letters acts and other material compiled at some point in the middle of the sixth century. Some of the documents are unique making the work an important scholarly resource. Guenther used the oldest and best surviving manuscript now in the Vatican Library: the first volume consists of documents 1-104 and the second of documents 105-244 with appendices and indices. The material ranges from letters about the enlargement of St Paul''s basilica in Rome by Theodosius I to disputes between Rome and Constantinople and the brief schism at the death of Pope Zosimus: schism heresy and the restoration of papal control are recurring themes throughout the compilation.