gradually replaced Hathor there in the course of the first millennium BCE. In Noricum in central Europe, Isis was syncretized with the local tutelary deity Noreia, and at Petra she may have been linked with the Arab goddess al-Uzza. The Roman author Tacitus said Isis was worshipped by the Suebi, a Germanic people living outside the empire, but he may have mistaken a Germanic goddess for Isis because, like her, the goddess was symbolized by a ship. Many of the aretalogies include long lists of goddesses with whom Isis was linked. These texts treat all the deities they list as forms of her, suggesting that in the eyes of the authors she was a summodeistic being: the one goddess for the entire civilized world. In the Roman religious world, many deities were referred to as "one" or "unique" in religious texts like these. At the same time, Hellenistic philosophers frequently saw the unifying, abstract principle of the cosmos as divine. Many of them reinterpreted traditional religions to fit their concept of this highest being, as Plutarch did with Isis and Osiris. In The Golden Ass Isis says "my one person manifests the aspects of all the gods and goddesses" and that she is "worshipped by all the world under different forms, with various rites, and by manifold names," although the Egyptians and Nubians use her true name, Isis. But when she lists the forms in which various Mediterranean peoples worship her, she mentions only female deities. Greco-Roman deities were firmly divided by gender, thus limiting how universal Isis could truly be. One aretalogy avoids this problem by calling Isis and Serapis, who was often said to subsume many male gods, the two "unique" deities. Similarly, both Plutarch and Apuleius limit Isis's importance by treating her as ultimately subordinate to Osiris. The claim that she was unique was meant to emphasize her greatness more than to make a precise theological statement. Iconography Images of Isis made outside Egypt were Hellenistic in style, like many of the images of her made in Egypt in Hellenistic and Roman times. The attributes she bore varied widely. She sometimes wore the Hathoric cow-horn headdress, but Greeks and Romans reduced its size and often interpreted it as a crescent moon. She could also wear headdresses incorporating leaves, flowers, or ears of grain. Other common traits included corkscrew locks of hair and an elaborate mantle tied in