All the watchtowers on the city wall of Villingen-Schwenningen are like this, here’s some more I found while on a short walk:


All the watchtowers on the city wall of Villingen-Schwenningen are like this, here’s some more I found while on a short walk:


This is a clock tower. Most likely the internal mechanisms for clock precludes a centerline window. Something bolted to the wall, etc.
That sounds pretty plausible, but I’m not sure.
The windows are only very slightly off center, inconsistent, and even the ones above the clock are as well (although the clock mechanism could extend both up and down).
But I also don’t have any better explanation.