21. The city has known major developments during the Hellenistique, Roman and Byzantine eras . 22. He reported finding several ancient remains, particularly stone crosses from the Byzantine era . 23. The Byzantine era of 5th or 6th centuries. 24. During the Byzantine era Erissos was the seat of a bishopric, evidenced from 883. 25. Most of them are presently uninhabited, but some date back to the Byzantine era . 26. The tomb is thought to have stood until the Byzantine era before falling into ruin. 27. The ruins of a monastery dating to the Byzantine era is present in the village. 28. Another group of interesting items is the group of 12 mummies from the Byzantine era . 29. Bloedhorn bases his assumptions on early Christian traditions and pilgrims'accounts from the Byzantine era . 30. Repeatedly destroyed and rebuilt, the city slowly declined and was abandoned in the Byzantine era .
