paper, such as tiles, vessels, carpets, and stone. Before the advent of paper, papyrus and parchment were used for writing. During the 9th century, an influx of paper from China revolutionized calligraphy. While monasteries in Europe treasured a few dozen volumes, libraries in the Muslim world regularly contained hundreds and even thousands of books. For centuries, the art of writing has fulfilled a central iconographic function in Islamic art. Although the academic tradition of Islamic calligraphy began in Baghdad, the centre of the Islamic empire during much of its early history, it eventually spread as far as India and Spain. Coins were another support for calligraphy. Beginning in 692, the Islamic caliphate reformed the coinage of the Near East by replacing Byzantine Christian imagery with Islamic phrases inscribed in Arabic. This was especially true for dinars, or gold coins of high value. Generally, the coins were inscribed with quotes from the Qur'an. By the tenth century, the Persians, who had converted to Islam, began weaving inscriptions onto elaborately patterned silks. So precious were textiles featuring Arabic text that Crusaders brought them to Europe as prized possessions. A notable example is the Suaire de Saint-Josse, used to wrap the bones of St. Josse in the Abbey of St. Josse-sur-Mer, near Caen in north-western France. As Islamic calligraphy is highly venerated, most works follow examples set by well-established calligraphers, with the exception of secular or contemporary works. In the Islamic tradition, calligraphers underwent extensive training in three stages, including the study of their teacher's models, in order to be granted certification. Styles Kufic The Kufic style emphasizes rigid and angular strokes, it developed alongside the Naskh script in the 7th century. 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. Due to its straight and orderly style of lettering, Kufic was frequently used in ornamental stone carving as well as on coins. It was the main script used to copy the Qur'an from the 8th to 10th century and went out of general use in the 12th century when the flowing naskh style become more practical. However, it continued to be used as a decorative element to contrast superseding styles. There was no set rules of using the