Muḥammad (; c. 570 CE – 8 June 632 CE), is the central figure of Islam and widely regarded as its founder. He is known to Muslims as the "Holy Prophet", almost all of whom consider him to be the last prophet sent by God to mankind to restore Islam, which they believe to be the unaltered original monotheistic faith of Adam, Abraham, Moses, Jesus, and other prophets. He united Arabia into a single Muslim polity and ensured that his teachings, practices, and the Quran, which Muslims believe was revealed to him by God, formed the basis of Islamic religious belief.