As an pseudonymous author of a Latin work Liber de magnis tribulationibus, the name was attached to a 1365 production of the Fraticelli.
[1] "Telesphorus" stated that he was born in Cosenza, Italy and lived as a hermit near the site of the ancient Thebes.
More than twenty manuscripts of it are extant, and it first appeared in print, with various interpolations, as Liber de magnis tribulationibus in proximo futuris (Venice, 1516).
The work was compiled about 1386 from the writings of Joachim of Fiore, Jean de Roquetaillade, the Cyrillic Prophecy (of Cyril of Constantinople), and other apocalyptic treatises whose authors are mentioned in the dedicatory preface addressed to Antoniotto Adorno, the Doge of Genoa.
Reeves suggests that the origin of the Telesphorus prophecy was the wish to put the Second Charlemagne in context for followers of Joachim of Fiore.