 XIII A 12).The title "Liber viaticus" comes directly from the book itself, which in a sort of bookplates is the text "Liber viaticus Domini Johannis, Luthomislensis Episcopi, imperialis cancellarii", which can be translated as "travel book of Mr. John, bishop of Litomysl, superior office".The Codex could therefore serve as a traveling breviary, albeit rather expensive to manufacture at least it raises doubts that he routinely traveled with the book.