A black and white photograph captures the repetitive pointed arches and stone columns of the covered arcade (Riwaq) surrounding the inner courtyard of the Mosque of Ibn Tulun (Masjid Ibn Tulun) in the Al-Sayyida Zeinab district of Cairo. Built between 876–879 CE during the Abbasid period, Ibn Tulun Mosque is the oldest mosque in Cairo to survive in its original form and is a UNESCO-recognized site of outstanding historical significance. The dramatic play of light and shadow across the stone floor emphasizes the mosque's austere Samarran architectural style, characterized by brick construction, pointed arches, and a vast open sahn (courtyard).