This library has one of the oldest (established in 861 AH/1457 CE) collection of Islamic manuscripts in the Muslim world and the most important in Iran.It has about 29,000 manuscripts in Arabic, Persian and Turkish. Of the 29,000 manuscripts it possess, 11,000 are manuscripts of the Qur’an, thus making it the largest Qur’anic manuscript collection in the world. It is also important in that it contains a large number of magnificent, old and illuminated Qur’anic manuscripts, including several old Kufic Qur’anic manuscripts written on deer skin, other with marvellous illuminations from 3rd century hijra (9th century CE) onwards, and some written by famous calligraphers. The manuscripts are catalogued in various publication as can be seen in the reference below.
 G. Roper (ed.), World Survey Of Islamic Manuscripts, 1992, Volume I, Al-Furqan Islamic Heritage Foundation, London, pp. 481-486.