A goddess of ecstatic and chthonic reproductive mysteries, Cybele was the primary mother goddess of ancient Anatolia, and Phrygia's only known goddess thus far. She was a "Mistress of Animals", "Great Mother" and "Mother of the Mountain" and it appears that Cybele was adopted by the Greeks in Asia Minor (modern day Turkey), and then adapted as she spread from there to mainland Greece, followed by Rome.
In Phrygia, no records remain concerning her cult and worship, though there are numerous statues of overweight, seated women that archaeologists believe represent Cybele. Often she is also portrayed giving birth, indicative of her Mother Goddess status.
Mother of the Mountain
Phrygian evidence for Cybele is made up of archaeological data in the form of rock carvings and excavated evidence from her principal cult site at Pessinus in the modern day Eskişehir province of Turkey. One such carving believed to reference Cybele calls her the "Mother of the mountain", a name which reveals her true Anatolian origins, as goddesses in Anatolia were often associated with specific mountains. Later, the Greeks and Romans kept better documentation of her cult, though much of her still remains a mystery.
Cybele has components of various mother goddesses in ancient Greece: Gaia, Rhea, and Demeter, each notable in their own aspects. Gaia is the ancient Greek mother goddess, responsible for birthing the gods and various aspects of the cosmos with Uranus. Rhea plays a similar role in the universe as the mother of the Olympians with ancient roots in Minoan and Mycenaean traditions. And Demeter is the mother goddess among the Olympians who is directly responsible for the changing of the seasons and thus the fertility of the earth.
Her Consort Attis
Her consort is the Phrygian shepherd called Attis, and their relationship was recognized in ancient Greece and Rome, though there are likely Phrygian roots to his character as well. Attis is believed to be her younger mate, often considered to be a deity himself, though beneath the goddess. It is highly debated whether Attis arrived with Cybele or after her, tacked on by the later Greek and Roman followers.
During the Roman Empire, the myth circulated that Attis castrated a king and was thus castrated in turn, and left to die under a pine tree. His followers buried him and then castrated themselves in his honor. These followers developed into Cybele's cult of priests, called the Galli.
Cybele from my poin of wiew. Adem Tuğuç
Attis' exact nature is as questionable as his status in relation to Cybele. According to the scholar Roller, "Attis" was a rather common name in Anatolia and associated with priestly activities. Therefore, it is also likely that Attis only obtained divine status among the Greeks, and that he was a mere shepherd in the Anatolian religion. It is also possible that Attis is not Cybele’s consort at all, but her attendant or a mendicant (as suggested by his name and lower status.)
Magna Mater
Cybele's Roman counterpart was more often referred to as Magna Mater, or "The Great Mother". Rome adopted Cybele during the Second Punic War, likely influenced by the dire conditions the war was expected to have on Rome. It was on the advice of the Sibylline oracle that Rome officially recognized Cybele as one of their foreign goddesses. As the Romans leveled Carthage, the Republic evidently saw her adoption as a very good move.
Romans also believed that Cybele was the primary goddess of the ancient city of Troy. The Romans considered the Trojan prince Aeneas to have been their predecessor, having settled in the location of Rome with the survivors of the war before the births of Romulus and Remus. It was even thought that Cybele provided Aeneas with shipbuilding materials. Thus, her adoption into the Roman pantheon would have been considered a unification of the past and present.