There are various forms of Arabic calligraphy. At its beginning, the Arabic calligraphy can be broadly categorized into two forms. The first is geometrical and angular, and the second is curved and flowing. From these two calligraphic methods emerged various styles. The Kufic script, the oldest and most venerable of the geometric calligraphies, can be executed with flowered edges or with geometrical knots, for example. While the cursive scripts include Thuluth, Raqaa and al-Nasekh etc. Read more about this object on the UNESCO Museums for Intercultural Dialogue website.