Elena Velkova Velkovska made some studies focusing on Byzantine tradition in Greek language and defined three major periods, namely the early period (fourth to fifth century), the euchological repertory (eighth to twelfth centuries), and the oldest rite (tenth century).
The Christian funeral rites in this period included the singing of psalms, and the celebration of the Eucharist at the cemetery.
[1] There are also commemorations for the third, ninth, and fortieth day after death, a practice that has been kept in the East until today.
[1] The Christian funeral rites in this period focused on prayers.
It takes place in the church and consisted of an opening blessing; also psalms of Matins were recited.