Farabi (Abū Nasr Muhammad al-Farab; Batı′da bilinen adıyla Alpharabius (d. 872 Farab – 14 Aralık 950 ile 12 Ocak 951 arası Şam), 8. ve 13. yüzyıllar arasındaki İslam'ın Altın Çağı'nda yaşamış ünlü filozof ve bilim adamı. Aynı zamanda gökbilimci, mantıkçı ve müzisyendir. Ünlü İslam bilgini Farabi 870 yılında Türkistan'da Siderya (Seyhun) nehri ile Aris'in birleştiği yerde kurulmuş eski bir yerleşim merkezi olan Farab'da (Otrar'da) doğdu. Burada doğduğu için Farab kentinde doğan anlamına gelen Farabi adını aldı. Yorumları ve incelemeleri sayesinde Farabi ortaçağ islam aydınları arasında Muallim-i Sânî ya da Hace-i Sâni (İkinci Üstad / Magister secundus) olarak bilinir. Hace-i Evvel (Birinci Üstad / Magister Primus) ise Aristo'dur. Farabinin İngilizce Hayatı Al-Farabi (Abū Naṣr Muḥammad ibn Muḥammad Al Farabi; for other recorded variants of his name see below), known in the West as Alpharabius (c. 872 in Farab – between 14 December, 950 and 12 January, 951 in Damascus), was a renowned philosopher and jurist who wrote in the fields of political philosophy, metaphysics, ethics and logic. He was also a scientist, cosmologist, mathematician and music scholar. In Arabic philosophical tradition, he is known with the honorific "the Second Master", after Aristotle. He is credited with preserving the original Greek texts during the Middle Ages because of his commentaries and treatises, and influencing many prominent philosophers, like Avicenna and Maimonides. Through his works, he became well-known in the East as well as the West. Al-Farabi spent almost his entire life in Baghdad. In the auto-biographical passage about the appearance of philosophy preserved by Ibn Abi Uṣaibiʿa, Farabi has stated that he had studied logic,medicine and sociology with Yuḥanna b. Ḥaylan up to and including Aristotle’s Posterior Analytics, i.e., according to the order of the books studied in the curriculum, Fārābī said that he studied Porphyry’s Eisagoge and Aristotle’s Categories, De Interpretatione, Prior and Posterior Analytics. His teacher, Yuḥanna b. Ḥaylan, was a Christian cleric who abandoned lay interests and engaged in his ecclesiastical duties, as Fārābī reports. His studies of Aristotelian logic with Yuḥanna in all probability took place in Baghdad, where Al-Masudi tells us Yūḥannā died during the caliphate of al-Moqtader (295-320/908-32). He was in Baghdad at least until the end of September 942 as we learn from notes in some manuscripts of his Mabādeʾ araʾ ahl al-madina al-fazela, he had started to compose the book in Baghdad at that time and then left and went to Syria. He finished the book in Damascus the following year (331), i.e., by September 943). He also lived and taught for some time in Aleppo. Later on Farabi visited Egypt; and complete six sections summarizing the book Mabādeʾ in Egypt in 337/July 948-June 949. He returned from Egypt to Syria. Al-Masudi writing barely five years after the fact (955-6, the date of the composition of the Tanbīh), says that he died in Damascus in Rajab 339 (between 14 December 950 and 12 January 951). In Syria, he was supported and glorified by Sayf al-Dawla, the Hamdanid ruler of Syria.