The inner courtyard (sahn) of Al-Hakim Bi-Amr Allah Mosque in Islamic Cairo photographed at dusk, with warm artificial lighting illuminating the arcade arches and central ablution fountain against a deep purple twilight sky. Worshippers are visible in prayer positions within the courtyard. Al-Hakim Mosque is one of Cairo's oldest and most significant Fatimid-era mosques, originally constructed between 990 and 1013 CE by the Fatimid Caliph Al-Hakim Bi-Amr Allah, and features two distinctive minarets that are among the earliest surviving examples of Fatimid minaret architecture in Egypt.