The Collectio Avellana (CA) has an extraordinary richness and variety of content. Imperial rescripts, reports of urban prefects, letters of bishops, and exchanges of letters between popes and emperors, some of which only this compilation preserves, constitute an exceptional documentary collection for researchers of various sectors of antiquity. This volume is the first publication to reconstruct the history of this compilation through the fascinating questions that it poses to the scholar. There are essays on its general structure, and on some of the most singular texts preserved therein....