Qizilbash or Kizilbash (Nastaliq: قزلباش - Qızılbāš; Ottoman Turkish for "Crimson/Red Heads"; sometimes also Qezelbash or Qazilbash) is the label given to a wide variety of Shī‘ī Islamic militant groups (ghulāt) that flourished in Anatolia and Azerbaijan from the late 13th century onwards, some of which contributed to the foundation of the Safavid dynasty of Iran. The expression "Red Heads" is derived from their distinctive twelve gored crimson headwear (tāj or tark in Persian; sometimes specifically titled "Haydar's Crown" / تاج حیدر / Tāj-e Ḥaydar), indicating their adherence to the twelve Ithnā‘asharī Imāms and to Shaykh Haydar, the spiritual leader (sheikh) of the Ṣafaviyya movement.

The origin of the Kizilbash - as they were called by their Sunni Ottoman foes, and who later adopted that name as a mark of pride - can be dated from the 15th century onward, when the spiritual grandmaster of the movement, Haydar (the head of the Ṣafawiyyah Sufi order), organized his followers into militant troops.

Erkan Oğur (pronounced [ˈeɾkan ˈoɰuɾ]), or Erkan Ogur in the West, (born 1954) is a Turkish musician. A pioneer of fretless guitars, he invented the first fretless classical guitar in 1976. A composer, he has influenced many musicians with his compositions combining the sounds of Turkish folk music, classical music with the ancient traditional music. He has played many concerts all over the world. He is regarded as a master of the kopuz and bağlama lutes.

Erkan Oğur was born in 1954, in Ankara, Turkey. He spent his childhood in Elazığ, eastern Turkey, where he became interested in violin and the Turkish bağlama lute, and started to practice them frequently. He graduated from high school in Elazığ, then moved to study physics at the Ankara University Faculty of Science from 1970 to 1973. As a result of encouragement to be a scientist by his father, he started to study chemical engineering and in 1974 continued his education in The Ludwig-Maximilians University Munich, Germany, for three years. He was introduced to guitar education in 1973. Instead of being a scientist, he chose to be a musician. Since he needed detailed sounds from a guitar in order to obtain Turkish melodies, he modified his guitar and invented the fretless classical guitar in 1976.