Frithjof Schuon, a philosopher and spiritual leader born in Basel in 1907, died on this day in 1998. He was a key figure in the Traditionalist School of Perennialism, writing extensively on the universal truths found across world religions. Schuon founded the Tarīqa Maryamiyya Sufi order, which established centers in Basel and elsewhere, and his work reflects a deep engagement with diverse spiritual traditions, including Native American spirituality, all rooted in his Basel upbringing. See wikipedia for more information.