The sole surviving Qur'an penned by Ibn al-Bawwab, housed at the Chester Beatty Library, is the earliest example of a paper-based Qur'an manuscript. Representing a transition from Kufic or semi-Kufic Qur'ans transcribed on parchment or vellum, the Chester Beatty manuscript is written fully in rounded, cursive script on paper. Though the art of paper-making had arrived in Baghdad in the 9th century via the Silk Road, the thinner and more consistent texture of Ibn al-Bawwab's manuscript indicates that the development of finer paper, worthy of transcribing God's word, was a factor in the move from parchment to paper.