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|Ahmet Kayhan Dede|
|Died||August 3, 1998|
 Early historyAhmet Kayhan was born in the Aktarla (Mako) village of Malatya Province, Turkey in early 1898, although the Turkish government lists his official year of birth as 1905. His father died when he was a child, and his mother in his early youth. For some years he stayed with an aunt.
Kayhan first met "Keko" (Ahmet Kaya Efendi), the man that would become his master, when he was only four or five years old. But his true discipleship began in his early twenties.
 Adult lifeBy 1922 Kayhan was living in Istanbul, making routine trips to the cities of Ankara and Malatya. In 1936 he relocated to Ankara, where he met Hajar, whom he would marry on March 25, 1937. His longtime master Ahmet Efendi died in 1944. Musa Kâzim Ağel, who had the same Master as Ahmet Kaya, continued to teach until his own death in 1967. After this, it was Ahmet Kayhan’s turn. He also gained the title "Dede", which actually means "Grandpa" and is appended to the name as an expression of loving respect as is customary towards elder relatives.
Ahmet Kayhan spent the rest of his life in Ankara, teaching and enlightening those around him and the many disciples that came to visit him from the 1960s on.
 Line of DescentMaster Kayhan's chain of transmission is traced through the Prophet Muhammad, his close associate Abu Bakr, Abdul-Qadir Gilani, Baha-ud-Din Naqshband Bukhari, Ahmad Sirhindi, Abdullah Dehlewi, Hadhrat Mawlânâ Khâlid-i Baghdâdî, Sheikh Samini, Osman Badruddin and Ahmet Kayhan Dede.
 Ahmet Kayhan’s Vision of World PeaceMaster Kayhan foresaw that nuclear/biological/chemical (NBC) weapons of mass destruction (WMDs), but basically nuclear ones, would bring about the end of humanity. To avert this cataclysm, he issued calls to world peace in the 1980s and 90s. One of these, An Invitation to Peace (1987), won widespread acclaim, among others from the Russian premier Gorbachev, the Vatican, the French president, as well as both the president and prime minister of Israel.
 Books by Ahmet KayhanAll books by Ahmet Kayhan were in the Turkish language.
- Âdem ve Âlem (“Man and Universe”) (1989),
- Ruh ve Beden (“Spirit and Body”) (1991),
- Aradığımı Buldum (“I Found What I Was Looking For”) (1992),
- İrfan Okulunda Oku (“Study in the School of Wisdom”) (1994).
 Books about Ahmet KayhanThe Biography of Ahmet Kayhan is written by Henry Bayman: The Teachings of a Perfect Master: An Islamic Saint for the Third Millennium published in 2012 by Anqa Publishing, ISBN 190593744X.
Other books published posthumously about Ahmet Kayhan and his teachings are:
- Hacı Ahmet Kayhan: Sohbetler (Kayhan Berişler et al., 2011, revised and expanded from an earlier 2007 edition). This is basically a transcription of the Master’s Friday discourses.
- Ayşe Serap Avanoğlu, Veiled Islam: A Deconstructive Sufi Formation, Unpublished Master’s thesis submitted to METU Dept. of Social Anthropology, 2012. Deals with an educated urban middle-class cross-section of the Master’s disciples.
- Henry Bayman, The Station of No Station: Open Secrets of the Sufis (2001) North Atlantic Books. ISBN 1556432402
- Henry Bayman, The Secret of Islam: Love and Law in the Religion of Ethics (2003) North Atlantic Books. ISBN 1556434324
- Henry Bayman, The Black Pearl: Spiritual Illumination In Sufism and East Asian Philosophies (2005) Monkfish Book Publishing. ISBN 0974935956