"Put the camera down immediately because it is forbidden in this place". The guard's tone didn't take any objections. A few hours ago, when we were among tourists from all over the world at the ground floor of Saint Marcus's temple in Venice, no one prevented us from taking pictures of the place. When we got on the balcony, though, where pieces of art that had been snatched from Constantinople (Istanbul) in 1204 were being kept, after its conquest by the crusaders, we were almost treated as criminals.