There was a time that the UK controlled some two-fifths of the Earth's dry surface and ruled a population of about 500 million people.
For a long time, the empire was a source of great pride to Britons. Today it provokes much more ambivalent feelings, with many considering it a shameful period in the UK's history.
Little remains of the overseas territories and few have a particularly high profile. So what's out there? Test yourself.