I mentioned before that the local council is fighting graffiti by allowing artists to paint high quality “graffiti” in places which get vandalised. The previous example is still in good condition, but here is another example, also in Oberursel, on the road to Schmitten.
Only a few hundred metres from here, you can see what tends to happen otherwise:
Very difficult choice as to which is the worst!
Not medieval, but celtic
nice pics, interesting site