Ibn Taymiyya was a Sunni Muslim scholar, jurist, traditionist, Qadiri, proto-Salafi theologian and iconoclast. He is known for his diplomatic involvement with the Ilkhanid ruler Ghazan Khan at the Battle of Marj al-Saffar, which ended the Mongol invasions of the Levant. A legal jurist of the Hanbali school, Ibn Taymiyya's condemnation of numerous Sufi practices associated with saint veneration and visitation of tombs made him a controversial figure with many rulers and scholars of the time, which caused him to be imprisoned several times as a result.