Recent research provides a better understanding of urban populations throughout history.
The stunning photos show some of the most recognisable places in the world.
Ultra high-definition footage from the International Space Station shows the Pyramids of Giza.
They take off at first light, reinforced wicker baskets filled with people.
The ancient metropolis of Alexandria set a powerful precedent for future cities all over the world.
Tim Peake shot over Africa, probably over the desert in Egypt.
During a flight to Cairo, Felix Gottwald was able to capture the Egyptian pyramids from above.
Joann Fletcher was disarmingly enthusiastic throughout this four-part BBC Two series.
Lanterns lie in the Luxor Temple as preparations are underway for a visit by Chinese President.
Senior pastors attend during Egypt’s Coptic Christmas eve mass led by Pope Tawadros II .