Mir 'Ali is often mentioned by Safavid sources as among the most important nasta'liq calligraphers of all time. Various authorities attribute the codifying of the aesthetic rules of nasta'liq script to him. Born in Herat circa 1476, he was later taken to Bukhara by the Shaybanid ruler 'Ubaydullah Khan after his capture of Herat in AH 935/1528-29 AD (Mehdi Bayani, Ahval va Asar-e Khosh-Nevisan, vol. II, Tehran 1346 sh., p.494). His recorded works are dated between AH 914/1508-09 AD and AH 951/1544-45 AD.