So, now that I've appropriately wet the blanket, this shot is from Bamberg, in the northern part of Bavaria. I've been to Germany a number of times, but this one was a new stop, and well worth the visit for its Rathaus perched amid the river in prime position to collect tolls.
We arrived in town after a fairly healthy drive from Berlin, which meant that the older members of the party went in immediate search of a restroom. Having found one in the tourist information office, I also stumbled upon this smokestack labelled "HB." And here's where we get speculative. For all I know, "HB" means "baker" or "factory" or something general in German. But to me, those two letters mean beer, as featured in the logo of the Hofbrau, of Hofbrauhaus in Munich. So I'm going with that.