From the article:
"Archaeologists working at the Forum site in Bulgaria’s city of Plovdiv have found a marble statuette of the Roman goddess Cybele . . The statuette is believed to date from the second century CE and was part of the pantheon of Philippopolis, an ancient name of Plovdiv, during the Roman era. . .In Roman mythology, Cybele was the universal mother, not only of the gods, but also of all humans, animals and plant life. Her equivalent in Greek mythology was Rhea."