A notice indicates the Rahmaniye mosque is from 1747, but that's all I know. Increasingly one can also see the coded notices that will bring you to a website. I often take them out using photoshop, as I think they are an eyesore. But here I let them stay (they sometimes work even from a picture).

I often use the web to find more information, and just saw "See all 13 photos taken at Rahmaniye Camii by 91 visitors". Did they hold camera's as a group, did a chorus shout "now press the button " to the guy with a camera?