Humankind has always had the urge to memorialise, to make physical testaments to the past. There's just one problem: when we carve a statue or put up a monument, it can hold us hostage to bad history. Keith Lowe uses monuments from around the world to show how countries have attempted to sculpt their history and what these memorials reveal about their politics and national identity today. What happens when our values change, but what we have set in stone does not?