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The Sultan Ahmed Mosque, also known as The Blue Mosque for the blue tiles adorning the walls of its interior, built from 1609 to 1616, during the rule of Ahmed I, at sunset in Istanbul, Turkey, 2006 (Credit: Constantin Barbu via Flickr and en.wikipedia.org)

The Sultan Ahmed Mosque, also known as The Blue Mosque for the blue tiles adorning the walls of its interior, built from 1609 to 1616, during the rule of Ahmed I, at sunset in Istanbul, Turkey, 2006 (Credit: Constantin Barbu via Flickr and en.wikipedia.org)