During the Abbasid Caliphate (AD751 - 1258), black became ... It was disrespectful if your clothing trailed on the ground or if under garments were past the ankle in length. Image caption, A ...

The period of the Abbasid Caliphate (750–1258) has long been recognized as the formative period of Islamic civilization with its various achievements in the areas of science, literature, and culture.