The rest of our short stay in Istanbul was fascinating. We went to the Blue Mosque, outside of which there are Turks washing their feet in these stone sinks lined up all around the building. Afterward we roamed the Hippodrome, this lovely park between the Blue Mosque and the Saint Ayasofia, during one of the many prayer hours. We could hear the amplified sounds of the Islam singing and chanting echoing across the square. One building would sing, the other would respond, a whole call and response.