[1] Legends claim that Orestias was founded by Orestes, the son of Agamemnon and Clytemnestra.
[2] Orestias took its name by the Greeks, at least from the time Philip II of Macedon took over the town.
The Roman emperor Hadrian expanded the town into a city, gave it a strong fortification and renamed it to Hadrianopolis (Greek: Αδριανούπολις).
[1][3][4] During the Ottoman period the name of Adrianou(polis) was paraphrased by the Turks and eventually became Edirne.
In 1920 when the Greeks took over most of Eastern Thrace including Edirne, they restored the city's Roman name (Adrianoupolis) and not its old Greek name (Orestias), which was given to its suburb Karaağaç, in remembrance of the ancient Thracian town.