What is "dorylaeum"

Dorylaeum or Dorylaion was an ancient city in Anatolia. It is now in ruins near the city of Eskişehir, Turkey.

Its original location was about 10 km southwest of Eskişehir, at a place now known as Karaca Hisar; about the end of the fourth century B.C. it was moved to a location north of modern Eskişehir.