David Cannadine looks ahead to the Queen's Diamond Jubilee, reflecting on the history and significance of royal jubilees worldwide and, in particular, the celebrations for Queen Victoria. "Diamond jubilees... are very much a construction of the late nineteenth and early twentieth centuries: both in terms of the grandiose ceremonials accompanying them, and also in terms of the narratives that have invariably been constructed to make some sort of sense of the six decades that are being commemorated." Producer: Sheila Cook.