Frithjof Schuon (18 June 1907 – 5 May 1998), also known as ʿĪsā Nūr ad-Dīn ʾAḥmad after his conversion to Islam, was an author of German ancestry born in Basel, Switzerland. Schuon was an influential scholar on comparative religion. His religious worldview was influenced by his study of Hindu philosophy and Islamic Sufism. He authored numerous books on religion and spirituality as well as being a poet and a painter. Schuon is one of the main members of the Traditionalist School.