Richard McGregor Professor of Islamic Studies at Vanderbilt University in Nashville icon-calendar Tuesday November 26ᵗʰ, 2019 Thanks to the precise study of the path and destiny of certain relics (the heads of al-Ḥusayn,  Muḥammad b. Ibn Abī Bakr or Alī Zayn al-ʿĀbidīn, prayer mats, footprints, turbans…), it is possible to