The Apostolic Tradition of Hippolytus (a.d. 215)
The Apostolic Tradition, a church order which was compiled sometime in the third century and attributed to Hippolytus of Rome probably contains a text of a complete eucharistic prayer or anaphora. Although much of the text may have been typical of the eucharistic prayers in use in Rome at the time, some scholars suggest that it reflects the way in which a conservative bishop may have wished the Eucharist were celebrated.