Eiletarion
An Eiletarion is a vertical liturgical scroll used in the Byzantine Empire that was used to read imperial donations or liturgical celebrations. It is featured in many mosaics and paintings during the Byzantine [Empire under the Komnenos dynasty|Komnenos period], including within the monastery of Nea Moni in Chios and the Hagia Sophia in Istanbul. Although it has been mostly phased out in favor of the codex, it is still used today in some monasteries on Mount Athos.