An unusual medieval gold seal with a gemstone engraved with an elephant carrying a castle on its back has been added to a museum's collection. Discovered by a metal detectorist near King's Lynn ...

This area was once famed for its pub — indeed, Elephant and Castle is named after a pub, which existed here for centuries. Its last incarnation was a workaday locals' boozer with a Thai kitchen ...

The design - showing an elephant with a war-tower or howdah on its back - later became known as the elephant and castle of heraldic iconography.

The seal matrix dates to between 1250 and 1350, a period covered by the reigns of Henry III, Edward I, Edward II and Edward III [Andrew Williams/Norfolk County Council] ...