 Complete the following phrase:  A committed monarchist and, till the First World War, well networked internationally with fellow medievalists, his personal diaries, which have been extensively researched and analysed posthumously, provide insights which are enlightening about the times through which he lived, and quite possibly constitute a more important contribution to European historiography than any of his published articles and books on the Medieval centuries. The war led him to break off his international contacts, most importantly with French and Belgian medieval scholars. He was never reconciled to the post-imperial Weimar Republic as Adolf Hitler scathingly termed the democratic regime that operated in Germany between 