The remains of the tenth and eleventh Shī`a Imāms, `Alī l-Hādī and his son Hassan al-`Askarī, known as "the two "`Askarī"s" ("al-`Askariyyān"), rest at the shrine. It stands next to a shrine to the Twelfth or "Hidden" Imām, Muħammad al-Mahdī. The `Askariyya Shrine is also known as the "Tomb or Mausoleum of the Two Imāms", "the Tomb of Imāms `Alī l-Hādī and Hassan al-`Askarī" and "al-Hadhratu l-`Askariyya".