Islam. Table of Contents. Islam - Qur'an, Doctrines, Beliefs: The doctrine about God in the Qurʾān is rigorously monotheistic: God is one and unique; he has no partner and no equal. Trinitarianism, the Christian belief that God is three persons in one substance, is vigorously repudiated. Hadith, corpus of the sayings or traditions of the Prophet Muhammad, revered by Muslims as a major source of religious law and moral guidance. It comprises many reports of varying length and authenticity. The individual reports are also called hadith (plural: hadiths). The word hadith is derived. Islam means "surrender" and its central idea is a surrendering to the will of God. Its central article of faith is that "There is no god but God and Muhammad is his messenger". Followers of Islam are called Muslims. Its function is best described in the Prophet's own words, namely that the mosque should be a garden of paradise. Islam's greatest architect was Sinan, a 16th century Ottoman builder who was responsible for the Sulaimaniye mosque in Istanbul. .

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