The Christianization of the Olympus region began relatively early. While the episcopal seats from Byzantine times only remaining ruins, inhabited and used monasteries and churches are still present at this time at Olympus. Some of the monasteries are a stauropegion, ie they are directly subordinate to the Patriarch of Constantinople (Istanbul), others belong to a diocese. The number of churches and chapels around Mount Olympus is hard to overlook. That is why only the monasteries and most important churches are mentioned.