Several years ago, I had the opportunity to travel to Germany. The town I live in here has a sister city there. So close friendships are formed and they also travel to visit us in the US.
Of course, we visited many museums, cathedrals, churches and saw beautiful scenery. When I returned home and viewed my photographs, I was surprised to see how many of them contained circles. Here are some of those. 
very nice circle pics ! nice story too. peace