Tiberius III, known as Tiberius the Restorer (Greek: Τιβέριος Γ ο Συντηρητής), was Roman Emperor and Caliph of Islam from AD 698-715. He was the son of Constans II, the brother of Constantine IV who had sent him into exile, and the uncle of Justinian II. He returned from exile and claimed the throne in 698 at the end of a period of anarchy following his nephew's deposition, and the first two years of his reign were spent trying to restore order and repel opportunistic incursions by the Bulgars and the Persians. Tiberius died in 715 at the age of 61. He was succeeded by his son, Theodosius III.