Each year there is a big LEGO meeting in Frechen just outside Cologne (Köln in German) which is always a feast for lovers of LEGO models usually with a particular emphasis on town. I’m sure many galleries will be popping up to show what was there but Klaus Dobisch’s one is particularly well photographed and a good selection of excellent models.
…And to focus on the model I used above: it’s incredible. Check out the grille in particular and the flag on the roof. I’d be willing to bet fat wads of cash that that model is by Klaus.