In this style of art, letters may be legible, illegible or may use pseudo-script. Rafa al-Naisiri (b. 1940) and Mahmoud Hammad (1923-1988) are notable examples of this style of artist.[39] Calligraphy Combinations Artworks that use any combination of calligraphy styles, often employing marginal calligraphy or unconscious calligraphy.