Muhaqqaq is one of the main six types of calligraphic script in Arabic. The Arabic word muḥaqqaq (محقَّق) means "consummate" or "clear", and originally was used to denote any accomplished piece of calligraphy.
Often used to copy maṣāḥif (singular muṣḥaf, i.e. loose sheets of Quran texts), this majestic type of script was considered one of the most beautiful, as well as one of the most difficult to execute well. The script saw its greatest use in the Mameluk era (1250–1516/1517). In the Ottoman Empire, it was gradually displaced by Thuluth and Naskh; from the 18th century onward, its use was largely restricted to the Basmala in Hilyas.
The earliest reference to muḥaqqaq writing is found in the Kitab al-Fihrist by Ibn al-Nadim, and the term was probably in use since the beginning of the Abbasid era to denote a specific writing style. Master calligraphers like Ibn Muqla and Ibn al-Bawwab contributed to the development of this and other scripts, and defined its rules and standards within Islamic calligraphy.