Looking elegant in a cool Anna Valentine tunic, trousers and flowing white headscarf, Camilla, 74, who went barefoot, then arrived at Al Azhar Mosque with her equally sophisticated husband, Charles, 73.Charles has visited the Cairo tourist destination before privately, but Camilla has never been to the site before – with both the royals appearing awe-struck as their guide talked them through 4,500 years of history.