Martin IV (pope from 22 Feb 1281 to March 28, 1285) completely reversed the policies of his predecessors by throwing his support to the king of France. This unusually long and detailed document issued by the papal chancery against the Emperor of Byzantium Michael VIII Palaeologos and King Peter III of Aragon illustrates the consequences of this reversal: it threatens both rulers with excommunication unless they promptly comply with the pope's commands. Both Michael Palaeologos and Peter of Aragon were eventually excommunicated. This conflict between the Holy See with the emperors of the East and the Kings of Aragon has received much attention by historians.
Impressa Venetiis : Mira arte & diligentia Ioannis de Tridino cognominati Tacuinus finiunt, Mcccccii die iii Ianuarii 
Book — VIIi [i.e. VIII], CLX, XXII leaves ; 35 cm (folio)
De ira Dei ; De opificio Dei ; Nephythomon ; Carmen de Phoenice / Lactantius. Apologeticus / Tertullianus. Adhortatio ad Theodosium / Philippus Sidetes. Carmen de Phoenice / Dante Alighieri. De resurrectione Domini / Venantius Fortunatus. De Eucharistia expositio / Joannes Chrysostomos. Sermo de Eucharistia / Laurentius Valla. Carmen de Phoenice / [Ovidius].
[London] : Impressum per Wynandu[m] de Worde com[m]ora[n]te[m] London[is] in vico nu[n]cupato Fletestrete sub intersignio solis ... (pro Johan[n]e Gaschet et Jacobo ferrebouc socijs), Millesimo quige[s?]tesimo non quarto ydus Februarij [Feb. 1509]