Had Imam Mahdi's mother been the granddaughter of Caesar, the King of the Romans? Shaikh Tusi, one of the great scholars and traditionists of the fifth century, in his book titled Al-Ghaiba (Occultation) reported Bishr bin Sulayman (a servant of 10th Imam, Imam Ali Al-Naqi (as)) as saying that one day, Imam Ali Al-Naqi (as) called him and said to him: “O’ Bishr, you are from the Ansars (inhabitants of …