In classical antiquity, Phrygia ( ; , Phrygía ) was a kingdom in the west central part of Anatolia, in what is now Asian Turkey, centered on the Sangarios River. After its conquest, it became a region of the great empires of the time. Stories of the heroic age of Greek mythology tell of several legendary Phrygian kings: Gordias, whose Gordian Knot would later be cut by Alexander the Great Midas, who turned whatever he touched to gold Mygdon, who warred with the Amazons According to Homer's Iliad, the Phrygians participated in the Trojan War as close allies of the Trojans, fighting against the Achaeans. Phrygian power reached its peak in the late 8th century BC under another, historical, king Midas, who dominated most of western and central Anatolia and rivaled Assyria and Urartu for power in eastern Anatolia. This later Midas was, however, also the last independent king of Phrygia before Cimmerians sacked the Phrygian capital, Gordium, around 695 BC. Phrygia then became subject to Lydia, and then successively to Persia, Alexander and his Hellenistic successors, Pergamon, the Roman Empire and the Byzantine Empire. Over this time Phrygians became Christian and Greek-speaking, assimilating into the Byzantine state; after the Turkish conquest of Byzantine Anatolia in the late Middle Ages, the name "Phrygia" passed out of usage as a territorial designation. Geography Phrygia describes an area on the western end of the high Anatolian plateau, an arid region quite unlike the forested lands to the north and west of it. Phrygia begins in the northwest where an area of dry steppe is diluted by the Sakarya and Porsuk river system and is home to the settlements of Dorylaeum near modern Eskişehir, and the Phrygian capital Gordion. The climate is harsh with hot summers and cold winters. Therefore, olives will not easily grow here so the land is mostly used for livestock grazing and barley production. South of Dorylaeum an important Phrygian settlement, Midas City (Yazılıkaya, Eskişehir), is situated in an area of hills and columns of volcanic tuff. To the south again, central Phrygia includes the cities of Afyonkarahisar (ancient Akroinon) with its marble quarries at nearby Docimium (İscehisar), and the town of Synnada. At the western end of Phrygia stood the towns of Aizanoi (modern Çavdarhisar) and Acmonia. From here to the southwest lies the hilly area of Phrygia that contrasts to the bare plains of the region's heartland.