The interior apse of the Greek Orthodox Church of Saint George (Mari Girgis) in Coptic Cairo (Masr El Qadima), showing ornate gold-gilded arched niches containing Byzantine-style painted icons of saints, deep red and green marble wall cladding, hanging oil lamps, and a central wooden door leading to the sanctuary. The Church of Saint George is one of the few circular churches in the Middle East, built over a Roman tower in the ancient fortress of Babylon. Coptic Cairo is home to some of Egypt's oldest Christian sites, reflecting over 2,000 years of Christian presence in Egypt.