Cleopatra, who also had an affair with legendary Roman emperor Julius Caesar, also inspired Shakespeare to write one of his most famous lines: "Age cannot wither her, nor custom stale/Her infinite variety."
But Lindsay Allason-Jones, the university's director of archaeological museums, said that the image of her as a great beauty is comparatively modern, dating back to medieval English poet Geoffrey Chaucer.
"Roman writers tell us that Cleopatra was intelligent and charismatic and that she had a seductive voice, but, tellingly, they do not mention her beauty," she said.
"It's one of those perpetual myths that has been perpetuated by having people like Elizabeth Taylor playing her and it's very difficult to get that out of peoples' psyches. She does look as if she's forgotten to put her teeth in," said Allason-Jones.