Stories of the Ismaili Imams: Mawlana Radi al-Din Abd Allah Mawlana Radi al-Din Abd Allah (peace be upon him) was the third and final Imam to live fully during the “period of concealment” (dawr al-satr). His given name was Husayn, but he used code names to protect his identity, including Radi al-Din Abd Allah. He succeeded to the Imamat at an unknown date during the mid-9th century and died in or around 881 in Askar Mukram in Persia, where he was buried. “Resolve, in the name of God, for by God,