Taqî ad-Dîn Aḥmad ibn Taymiyyah, full name: Taqī ad-Dīn Abu 'l-`Abbās Aḥmad ibn `Abd al-Ḥalīm ibn `Abd as-Salām Ibn Taymiyyah al-Ḥarrānī, was an Islamic scholar, Islamic philosopher, theologian and logician. He lived during the troubled times of the Mongol invasions. He was a member of the school founded by Ahmad ibn Hanbal, and is considered by his followers, along with Ibn Qudamah, as one of the two most significant proponents of Hanbalism; in the modern era, his adherents often refer to the two as "the two sheikhs and Sheikh ul-Islam. Ibn Taymiyyah was notable for having sought the return of Islam to what he viewed as earlier interpretations of the Qur'an and the Sunnah.