Men perform ablution (wudu) at the large circular marble fountain in the open courtyard of Al-Hakim bi-Amr Allah Mosque, one of Cairo's oldest Fatimid mosques founded in 1013 CE. The restored courtyard features white marble paving, turquoise arched arcades, and decorative crenellated walls characteristic of Fatimid architecture. The ablution fountain serves worshippers before prayer, preserving a centuries-old Islamic ritual practice within a landmark of Islamic Cairo.