Acta et Diplomata Graeca Medii Aevi Sacra et Profana - Bog

This six-volume work, published in Vienna between 1860 and 1890, contains a selection of documents in Greek which throw light on the history and politics of the Byzantine Empire in the Middle Ages. Volume 2 (published in 1862) contains further letters and decrees of the fourteenth-century Patriarchs of Constantinople.