So I have been working on the portrayal of Islam in early Franciscan documents (especially the various lives of St.Francis), and ran across this little tidbit, in David Burr’s Spiritual Franciscans, about two of my favorite Franciscans: Peter John Olivi and Ubertino da Casale (of Name of the Rose fame). Olivi argues, for instance, in his commentary on the Apocalypse of John (1298) that

Continued decay of the Church will lead to rule by a pseudopope who, with the aid of a secular authority, will support a carnal version of Christianity, persecuting those who observe evangelical poverty. These carnal leaders and the carnal church which they represent (Babylon) will eventually be destroyed by a non-Christian (presumably Muslim) army. Thus will end the persecution of the mystical Antichrist, but that of the great Antichrist will then begin. Another king/pseudopope combination will join in a persecution aimed more explicitly at Christianity itself. Here, too, Olivi seems to anticipate an important role for Islam. Finally, with Christ’s aid, this second persecution will end and the seventh period will begin.

All this of course so that the renewal of Christian life initiated by Francis could reach its consummation.