2 Analysis of Scientific-Geometric Discourse in Islamic Calligraphy Treatises During the Fourth to Eighth AH Centuries 1 Mahmood Vatankhah Khaneghah 1 , Amir Maziar* 2 1- Graduate Master in Islamic Arts, Department of Islamic Art, Faculty of Conservation and restoration, Art University of Tehran,Tehran, Iran. 2- Assistant Professor, Department of Philosophy of Art, Faculty of Theoretical Sciences and Higher Studies of Art, Art University of Tehran, Tehran, Iran. Research Paper: Honar-Ha-Ye-Ziba: Honar-Ha-Ye-Tajassomi, 25(3), pp. 63-72. doi: 10.22059/jfava.2019.282162.666224 (Received 26 May 2019, Accepted 20 Jul 2019) Calligraphy holds a unique place in Islamic arts and has been influenced substantially by historical and social factors from the early centuries up to the present. An important part of these factors has not been studied mainly due to the singular, concentrated point of view prevalent in common approaches to the study of Islamic calligraphy. A different approach is to not only take into account the historical evolutions that have taken place, but also to review the dominant discourses on the calligraphy during different historical periods. One of the discourses that has dominated the Islamic calligraphy, especially from the fourth to the eighth AH centuries (10th-15th A.D), is a scientific-geometric (Sci-Geo) discourse. The impact of the Sci-Geo discourse is not limited to Islamic calligraphy, and in fact, has resulted in a wide ranging influence on a variety of practical and theoretical fields. The birth of the Sci-Geo discourse can be traced back to Islamic translation movement during which the Greek scientific texts were translated. At the same time, the writing and publications of the scientific texts by the Islamic scholars, especially on mathematics and geometry gave rise to the Sci-Geo discourse. Indeed, the Sci-Geo discourse was a result of widespread rationalism and Scientism among the Islamic communities in the Middle Ages. Therefore, a careful study of the calligraphy treaties and texts from various fields that have been produced during that era presents a unique and distinct opportunity to understand the features of the Sci-Geo discourse. By reviewing the remaining texts of scholars of this period, such as encyclopedias and mathematical manuals, as well as referring to the opinions of contemporary Islamic art scholars, it is concluded that there is a very serious and profound interplay between mathematical and geometrical sciences with various industries, crafts, sciences and arts in the 1 This article is extracted from the first author’s master thesis, titled: “Analysis of Scientific-Geometric Discourse in Islamic Calligraphy Treatises During the Fourth to Eighth AH Centuries” under supervision of second author. *Corresponding Author Tel: (+98-912) 7125730, Fax: (+98-21) 66725685, E-mail: maziar1356@gmail.com