Islamic calligraphy is the artistic practice of handwriting and calligraphy, in the languages which use Arabic alphabet or the alphabets derived from it. It includes Arabic, Persian, Ottoman, and Urdu calligraphy. It is known in Arabic as khatt Arabi (), which translates into Arabic line, design, or construction. The development of Islamic calligraphy is strongly tied to the Qur'an; chapters and excerpts from the Qur'an are a common and almost universal text upon which Islamic calligraphy is based. Although artistic depictions of people and animals are not explicitly forbidden by the Qur'an, pictures have traditionally been limited in Islamic books in order to avoid idolatry. Although some scholars dispute this, Kufic script was supposedly developed around the end of the 7th century in Kufa, Iraq, from which it takes its name. The style later developed into several varieties, including floral, foliated, plaited or interlaced, bordered, and square kufic. In the ancient world, though, artists would often get around this prohibition by using strands of tiny writing to construct lines and images. Calligraphy was a valued art form, even as a moral good. An ancient Arabic proverb illustrates this point by emphatically stating that "Purity of writing is purity of the soul." However, Islamic calligraphy is not limited to strictly religious subjects, objects, or spaces. Like all Islamic art, it encompasses a diverse array of works created in a wide variety of contexts. The prevalence of calligraphy in Islamic art is not directly related to its non-figural tradition; rather, it reflects the centrality of the notion of writing and written text in Islam. For instance, the Islamic prophet Muhammad is related to have said: "The first thing God created was the pen." Islamic calligraphy developed from two major styles: Kufic and Naskh. There are several variations of each, as well as regionally specific styles. Arabic or Persian calligraphy has also been incorporated into modern art, beginning with the post-colonial period in the Middle East, as well as the more recent style of calligraffiti. Instruments and media The traditional instrument of the Islamic calligrapher is the kalam, a pen normally made of dried reed or bamboo. The ink is often in colour and chosen so that its intensity can vary greatly, creating dynamism and movement in the letter forms. Some styles are often written using a metallic-tip pen. Islamic calligraphy can be applied to a wide range of decorative mediums other than