In the fifth Century, Salona's bishops started exercising more metropolitan duties (archbishop Hezihius), and in the sixth century they carried the archbishop title as well (arhiepiscopus), and fulfilled the duties associated with the title. (archbishops Stephen, Honorius and others). That means that at that time they held primary positions in western Illyria. Siscia's bishop from the region Pannonia joined the Dalmatian bishops on the synods held in Salona in the years 530 and 533 as a member with full rights. At the time of Diocletian, Salona had a population of 60,000.