The way we made ourselves familiar with these huge buildings that we walked around

We don’t have so much CCTV in Germany. It isn’t spread out so densly over German cities. It is not the normal case that there are cameras in public space but just in some places where crimes take place. However in the last years the cameras are getting more and more in German cities, too.

You can see the shadows of the ventilators on the town wall. Some  rests of the town wall are still outliving the centuries and every decade leaves some little traces on it. The shadows could be some temporary traces that just lasts as long as the sun is shining.

The different use takes away the original function of the letter box and changed it into some kind of walk-by ashtray.

Protection makes your life safer? It is suggestive of armed protection which would even defend the neighbour with violence and not some kind of prevention by communication or getting to know each other. It somehow  seems to implicate that you as a stranger are a potential danger for the neighbourhood.