Adrasteia or Adrastea was the name of a region, city, and valley of Mysia

Mysia

Mysia was a region in the northwest of ancient Asia Minor or Anatolia . It was located on the south coast of the Sea of Marmara. It was bounded by Bithynia on the east, Phrygia on the southeast, Lydia on the south, Aeolis on the southwest, Troad on the west and by the Propontis on the north...

, which was watered by the Granicus River. In the eponymous city was an oracle of Apollo

Apollo

Apollo is one of the most important and complex of the Olympian deities in Greek and Roman mythology...

 and Artemis

Artemis

Artemis was one of the most widely venerated of the Ancient Greek deities. Her Roman equivalent is Diana. Some scholars believe that the name and indeed the goddess herself was originally pre-Greek. Homer refers to her as Artemis Agrotera, Potnia Theron: "Artemis of the wildland, Mistress of Animals"...

. The temple had been destroyed by the time of Strabo

Strabo

Strabo, also written Strabon was a Greek historian, geographer and philosopher.-Life:Strabo was born to an affluent family from Amaseia in Pontus , a city which he said was situated the approximate equivalent of 75 km from the Black Sea...

, and the stones used to build a large altar. Parium

Parium

Parium was a Greek city of Adrasteia in Mysia on the Hellespont. It became a Roman Catholic titular see, suffragan of Cyzicus in the Roman province of Hellespontus.-History:...

 was a port of the region.

Callisthenes

Callisthenes

Callisthenes of Olynthus was a Greek historian. He was the son of Hero and Proxenus of Atarneus, which made him the great nephew of Aristotle by his sister Arimneste. They first met when Aristotle tutored Alexander the Great...

 said that it was named after the ancient king Adrastus

Adrastus

Adrastus or Adrestus , traditionally translated as "nonparticipant" or "uncooperative", was a legendary king of Argos during the war of the Seven Against Thebes.-Mythological tradition:...

, who had founded the first temple there.

Adrasteia was one of the cities of the era of the Trojan War

Trojan War

In Greek mythology, the Trojan War was waged against the city of Troy by the Achaeans after Paris of Troy took Helen from her husband Menelaus, the king of Sparta. The war is among the most important events in Greek mythology and was narrated in many works of Greek literature, including the Iliad...

; it probably belonged to the realm of Troy. Its lords were the two sons of Merope of Percote

Percote

Percote was a town or city on the southern side of the Hellespont, to the northeast of Troy. Percote is mentioned a few times in Greek mythology, where it plays a very minor role each time. It was said to be the home of a notable seer named Merops, also its ruler...

.