The adoption of the mother of Jesus as a virtual goddess may represent a reintroduction of aspects of the worship of Isis. "When looking at images of the Egyptian goddess Isis and those of the Virgin Mary, one may initially observe <answer>iconographic</answer> similarities. These parallels have led many scholars to suggest that there is a distinct <answer>iconographic</answer> relationship between Isis and Mary. In fact, some scholars have gone even further, and have suggested, on the basis of this relationship, a direct link between the cult of Mary and that of Isis." 
What kind of relationship do some scholars believe exists between Isis and Mary?
iconographic