Question: The Traditionalist School is a group of thinkers that includes the English Muslim writer who was a student of what Swiss metaphysician?
Context: Leo Schaya (1916–1985) was a Swiss author and scholar whose works focused on the Sufi tradition, the Kabbalah, and the Traditionalist School. In Dutch architecture, the Traditionalist School (also Traditionalism) was a reaction against functionalism as well as the expressionism of the Amsterdam School, and meant a revival of rural and national architectural styles and traditions, with tidy, visible brickwork, minimal decoration and "honest" (that is, traditional and natural) materials. Catherine Heseltine (born 1978) is an English Muslim activist.  She was elected as the CEO of Muslim Public Affairs Committee UK, a Muslim pressure group that opposes Zionism and Islamophobia.  She has appeared regularly in newspapers and on television discussing issues impacting the British Muslim community as well as encouraging British Muslims to get involved in mainstream politics and to engage with the community . Ibn Qudāmah al-Maqdīsī Muwaffaq al-Dīn Abū Muḥammad ʿAbd Allāh b. Aḥmad b. Muḥammad (Arabic ابن قدامة, "Ibn Qudāmah"; 1147 - 7 July 1223), often referred to as Ibn Qudamah or Ibn Qudama for short, was a Sunni Muslim ascetic, jurisconsult, traditionalist theologian, and religious mystic.  Having authored many important treatises on jurisprudence and religious doctrine, including one of the standard works of Hanbali law, the revered "al-Mug̲h̲nī", Ibn Qudamah is highly regarded in Sunnism for being one of the most notable and influential thinkers of the Hanbali school of orthodox Sunni jurisprudence.  Within that school, he is one of the few thinkers to be given the honorific epithet of Shaykh of Islam, which is a prestigious title bestowed by Sunnis on some of the most important thinkers of their tradition.  A proponent of the classical Sunni position of the "differences between the scholars being a mercy," Ibn Qudamah is famous for having said: "The consensus of the Imams of jurisprudence is an overwhelming proof and their disagreement is a vast mercy." The Traditionalist School is a group of 20th and 21st century thinkers concerned with what they considered to be the demise of traditional forms of knowledge, both aesthetic and spiritual, within Western society.  The principal thinkers in this tradition are René Guénon, Ananda Coomaraswamy and Frithjof Schuon.  Other important thinkers in this tradition include Titus Burckhardt, Martin Lings, Jean-Louis Michon, Marco Pallis, Huston Smith, Hossein Nasr, Jean Borella, Julius Evola and William Chittick.  A central belief of this school is the existence of a "perennial wisdom", or perennial philosophy, which says that there are primordial and universal truths which form the source for, and are shared by all the major world religions. Marianne Martindale (Catherine Tyrell, Mari de Colwyn) is an English writer and columnist.  As Miss Martindale, she was a prominent public face of Aristasia, an all-female subculture inspired by the Traditionalist School and early twentieth-century culture, many members of which attended a "school" at her West London home.  Aristasia is a feminine version of the Greek word "aristos", which means 'the best'.  Martindale received national attention in the British press in the 1990s for her advocacy of corporal punishment. Wolfgang Smith (born 1930) is a mathematician, physicist, philosopher of science, metaphysician, Roman Catholic and member of the Traditionalist School.  He has written extensively in the field of differential geometry, as a critic of scientism and as a proponent of a new interpretation of quantum mechanics that draws heavily from medieval ontology and realism. John Frederick Carden Michell (9 February 1933 – 24 April 2009) was an English author and esotericist who was a prominent figure in the development of the Earth mysteries movement.  Over the course of his life he published over forty books on an array of different subjects, being a proponent of the Traditionalist school of esoteric thought. Béla Hamvas (23 March 1897 – 7 November 1968) was a Hungarian writer, philosopher, and social critic.  He was the first thinker to introduce the Traditionalist School of René Guénon to Hungary. Martin Lings (24 January 1909 – 12 May 2005), also known as Abū Bakr Sirāj ad-Dīn, was an English Muslim writer, scholar, and philosopher.  A student of the Swiss metaphysician Frithjof Schuon and an authority on the work of William Shakespeare, he is best known as the author of "", first published in 1983 and still in print.
Answer: Frithjof Schuon