Hofkeller (Restaurant Hofkellerei), Chur, Plessur District, Switzerland, 2011

The Hof Keller appears to be not a house, but more of a castle. This tower makes that obvious, but you can also see what I mean on this Google Map:

maps.google.com/maps?hl=en&ll=46.847982,9.534996&...

I don't know much about the background of this building, though, as I've had trouble finding it in any online guides for Chur. One thing I do know is that slightly inside this gate is a restaurant, as indicated in the photo title.