Two middle-aged Egyptian men sit side by side on Al-Muizz Li-Din Allah Street (شارع المعز لدين الله) in Islamic Cairo, laughing and enjoying each other's company during a January winter day. Both men wear casual winter jackets, seated in front of a weathered historic wooden door typical of the Fatimid-era architecture lining Al-Muizz Street. Al-Muizz is one of Cairo's oldest and most historically significant streets, stretching through the heart of Islamic Cairo and lined with medieval mosques, palaces, and merchant houses.