Mir Emad (born Emad al-Molk Qazvini Hasani (Persian: میرعماد حسنی قزوینی)‎ 1554 – August 15, 1615) is perhaps the most celebrated Persiancalligrapher. It is believed that theNasta'liq style reached its highest elegance in Mir Emad's works.[2] These are amongst the finest specimens of Nasta'liq calligraphy and are kept in several museums in the world.

Courtesy: Wikipedia

http://en.wikipedia.org/wiki/Mir_Emad_Hassani