Angela Merkel admitted earlier this week that Germany remained so preoccupied with guilt for the disaster of the Second World War and that most Germans did not have the First World War much in mind. Dieter Kolle, a 45-year-old product designer from Cologne who was visiting the exhibition with his twelve year old son seemed to agree. “ It is a very comprehensive exhibition and I learned a lot of things I didn’t know,” he told The Telegraph.