Before building Cairo as we know it now, there was a district where early Christians were living and making their Churchs; it’s called now the Old Cairo.
St Mary church, the Hanging Church, most famous Church in the area, because of its unique way of building over two walls from an old Roman fortress, that’s why it’s called hanging.
St Barbara church was built from the 5th century, where you can witness the ancient Coptic architecture.
St Sergius and Bacchus Church, also known as Abu Serga, where the Holy Family had reset during their trip through Egypt.