Inside the Old Walls of Nürnberg

The first photo shows the cobblestone street––notice the width of the street––and a modern wall that is boundary of someone's house/yard today.

The second photo gives a better look at the outer wall.  The tower has the door which is an entrance to the upper walkway of the wall.  Here I can imagine the men, whose duty it was to defend the city, walking their assigned stretch and keeping a close surveillance of any activity outside the city.