Describing the Codex Gigas, a thirteenth-century manuscript from Bohemia in the Swedish National Library in Stockholm, it is stated: "All this bears witness to the outstanding importance of the cult of Vaclav in Bohemia at the time of the Devil's Bible's compilation. Moreover, all three festivals are inscribed in red ink, denoting their superlative degree."
The First Slavonic Life (in Old Church Slavonic), the anonymous Crescente fide [cs] (in Latin), the Passio sancti Venceslavi martyris (in Latin) by Gumpold, bishop of Mantua (d. 985), and Vita et passio sancti Venceslai et sancte Ludmile ave eius (in Latin) (The Life and Passion of Saint Václav and his Grandmother Saint Ludmila) by Strachkvas (Kristián) as described in the Kristiánova legenda [cs].
