Prince Charles and Duchess of Cornwall arrive at the Great Pyramid of Giza after visit to Al Azhar Mosque in Cairo

They walked carefully up several steps up the side of the 454ft (138.5m) high pyramid called Khufu – or Pyramid of Cheops – and briefly stepped into the tunnel entrance out of view.Ashraf Mohi, director of the Pyramid Complex, walked the couple around the three pyramids and to the Great Sphinx. He told them: ‘You are stepping on rocks that go back centuries and centuries.