a number of volumes. This is evident from the large scripts used and the smaller number of lines per page. Early Quranic manuscripts provide evidence for the history of the Quranic text and their formal features tell us something about the way art and its deeper meaning were perceived in the classical age of Islam. Both its script and layout turned out to be constructed according to elaborate geometrical and proportional rules. The main characteristic of these scripts was their writing style. The letters in most of these manuscripts are heavy-looking, relatively short and horizontally elongated. The slanted isolated form of the alif that was present in the Umayyad period completely disappeared and was replaced by a straight shaft with a pronounced right-sided foot, set at a considerable distance from the following letter. Also, unlike the Hijazi scripts, these are often richly illuminated in gold and other colours. Another difference is that sura headings are clearly marked and enclosed in rectangular panels with marginal vignettes or palmettes protruding into the outer margins. These Qurans of the early Abbasid period were also bound in wooden boards, structured like a box enclosed on all sides with a movable upper cover that was fastened to the rest of the structure with leather thongs. New Abbasid Style The New Abbasid Style (NS) began at the end of the 9th century C.E. and was used for copying the Quran until the 12th centuries, and maybe even as late as the 13th century. Unlike manuscripts copied in Early Abbasid scripts, NS manuscripts had vertical formats. During this time, Al-Khalil ibn Ahmad al-Farahidi (died 786) devised a tashkil system to replace that of Abu al-Aswad. His system has been universally used since the early 11th century, and includes six diacritical marks: fatha (a), damma (u), kasra (i), sukun (vowel-less), shadda (double consonant), madda (vowel prolongation; applied to the alif). Another central figure during this time was Abu Bakr b. Mujāhid (died 324/936). His goal was to restrict the number of reliable readings and accept only those based on a fairly uniform consonantal text. He chose seven well-known Quran teachers of the 2nd/8th century and declared that their readings all had divine authority, which the others lacked. He based this on the popular ḥadith in which Muhammad says the Quran was revealed to him in "seven aḥruf". During this time there was strong Quranic traditions in Kufa, Baṣra,