Hundreds of thousands of amulets and votive statues of Isis nursing Horus were made during the first millennium BCE, and in Roman Egypt she was among the deities most commonly represented in household religious art, such as figurines and panel paintings. Isis was prominent in magical texts from the Middle Kingdom onward. The dangers Horus faces in childhood are a frequent theme in magical healing spells, in which Isis's efforts to heal him are extended to cure any patient. In many of these spells, Isis forces Ra to help Horus by declaring that she will stop the sun in its course through the sky unless her son is cured. Other spells equated pregnant women with Isis to ensure that they would deliver their children successfully. Egyptian magic began to incorporate Christian concepts as Christianity was established in Egypt, but Egyptian and Greek deities continued to appear in spells long after their temple worship had ceased. Spells that may date to the sixth, seventh, or eighth centuries CE invoke the name of Isis alongside Christian figures. In the Greco-Roman world Spread Cults based in a particular city or nation were the norm across the ancient world until the mid- to late first millennium BCE, when increased contact between different cultures allowed some cults to spread more widely. Greeks were aware of Egyptian deities, including Isis, at least as early as the Archaic Period (c. 700–480 BCE), and her first known temple in Greece was built during or before the fourth century BCE by Egyptians living in Athens. The conquests of Alexander the Great late in that century created Hellenistic kingdoms around the Mediterranean and Near East, including Ptolemaic Egypt, and put Greek and non-Greek religions in much closer contact. The resulting diffusion of cultures allowed many religious traditions to spread across the Hellenistic world in the last three centuries BCE. The new mobile cults adapted greatly to appeal to people from a variety of cultures. The cults of Isis and Serapis were among those that expanded in this way. Spread by merchants and other Mediterranean travelers, the cults of Isis and Serapis were established in Greek port cities at the end of the fourth century BCE and expanded throughout Greece and Asia Minor during the third and second centuries. The Greek island of Delos was an early cult center for both deities, and its status as a trading center made it