Focusing on a key year in the last age of Byzantium – 1347, when the civil war that had ravaged the Empire for four years, accompanied by religious dissent and social unrest, finally ended – the book of Antonio Rigo offers an overall reconstruction of the ecclesiastical events and dynamics between the different groups involved, while also presenting a critical edition of two documents from the summer of 1347: the Tome of the opponents and that of the deposition of Matthew of Ephesus, followed by other minor pieces.