Although the Saladin Citadel in Cairo was built in the 12th century to help protect the city from the Crusaders, the Muhammad Ali Mosque came much later, in the 19th century. Built in the architectural style of the Ottomans, the mosque has a feeling of wide open grandeur punctuated by chandeliers and cupolas.
Sit on the carpet in middle for as long as you need. Look up, look around and enjoy the peacefulness of the place.
Panorama: Muhammad Ali Mosque at Saladin Citadel in Cairo, Egypt