Kirkwall isn’t a huge place, but it’s technically a city. There’s a port, which often has cruise ships moored (or anchored off for the really huge ones, or when there are a lot at once) a good range of shops for tourists and locals, a really good museum, couple of palaces (bishop’s and earl’s).
I believe what makes it a city however, is St Magnus’s Cathedral.

Sorry for the lack of detail about many of the places we’ve visited. Longer posts would mean fewer words added to the next novel in my cosy mystery series, and with the amount of exploring we’re doing, I haven’t been spending a huge amount of time on that.