Leo I the Thracian
As an episcopal see, Carystus was initially a suffragan of Corinth, but in the 9th century it came to be associated with Athens and appears as such in the "Notitia Episcopatuum" composed under Byzantine Emperor Leo VI the Wise (886-912). A bishop of the see called Cyriacus was one of the signatories of the letter of the episcopate of the Corinthian province to Emperor Leo I the Thracian in 458.