Nazi Germany's plot to crash the British economy features in the Peaky Blinders film and in a new exhibition.
The day will include re-enactments and living history displays among other free activities.
Researchers at the University of Waterloo found remains of Rich Preston's great great great uncle John Bridgens.
The coins will join 933 other treasures due to go on display for the first time in July.
The lead coffin found in Colchester contains the remains of a high-status woman, experts say.
In May 1917, three Portuguese children declared that they had seen an apparition of the Virgin Mary in a meadow. In 1992, a witness told the BBC about the "miracles".
Boston MP Herbert Ingram drowned in 1860 when two ships collided on Lake Michigan in the US.
Mel Parry took one of the defining images of the Aberfan disaster, but "wished he'd never taken it".
The coins were minted by a Saxon king who could not prevent an upsurge in Viking raids, says expert.
