Taqī ad-Dīn Ahmad ibn Taymiyyah (Arabic: تقي الدين أحمد ابن تيمية, January 22, 1263 – September 26, 1328), known as Ibn Taymiyyah for short, was a controversial medieval Sunni Muslim theologian, jurisconsult, logician, and reformer. A member of the Hanbali school of jurisprudence founded by Ahmad ibn Hanbal, Ibn Taymiyyah was also a member of the Qadiriyya Sufi order founded by the twelfth-century mystic and saint Abdul-Qadir Gilani. A polarizing figure in his own lifetime, Ibn Taymiyyah’s iconoclastic views on widely accepted Sunni doctrines such as the veneration of saints and the visitation to their tomb-shrines made him unpopular with the majority of the orthodox religious scholars of the time, under whose orders he was imprisoned several times.
Often viewed as a minority figure in his own times and in the centuries that followed, Ibn Taymiyyah has become one of the most influential medieval writers in contemporary Islam, where his particular interpretations of the Qur’an and the Sunnah and his rejection of some aspects of classical Islamic tradition are believed to have had considerable influence on contemporary Wahhabism, Salafism, and Jihadism. Indeed, particular aspects of his teachings had a profound influence on Muhammad ibn Abd al-Wahhab, the founder of the Hanbali reform movement practiced in Saudi Arabia known as Wahhabism, and on other later Wahabi scholars.