Mujaddid

A mujaddid (Arabic: مجدد‎), according to the popular Muslim tradition, refers to a person who appears at the turn of every century of the Islamic calendar to revive Islam, remove from it any extraneous elements and restore it to its pristine purity. A mujaddid might be a caliph, a saint (wali), a prominent teacher, a scholar or some other kind of influential person.