Last week, three exhibitions celebrating the art of Germany; this week, a show commemorating the first world war fought against that great nation. In this centenary year of the beginning of WW1, there will be numerous events marking the start of hostilities. (Will there be as many celebrating the anniversary of their cessation, I wonder?) Although there is some film footage of the war, and detailed photographic documentation of its horrors, the best record we have of the human reality of those five years of conflict resides in the art made about it.