Thuluth
Thuluth (Arabic: ثُلُث, Thuluth or Arabic: خَطُّ الثُّلُثِ, Khaṭṭ-uth-Thuluth; Persian: ثلث, Sols; Turkish: Sülüs, from thuluth "one-third") is an Arabic script variety of Islamic calligraphy. The straight angular forms of Kufic were replaced in the new script by curved and oblique lines.