Newark and Sherwood District Council will begin work today on the UK's first National Civil War Centre.
The £5.4 million project includes a £3.5 million grant from the Heritage Lottery Fund.
Items to go on display include an Iron Age Newark Torc or necklace, an exquisite Anglo-Saxon gold cross, paintings from Newark-born artist Sir William Nicholson and the Byron Press, used to print a number of the early works of the Victorian poet Lord Byron.
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A cloudy and mild day with outbreaks of rain at times, which could be heavier in the morning.
The extension will run through Dudley to the DY5 Enterprise Zone at Brierley Hill and is estimated will create 7,000 jobs.
Outbreaks of rain will remain throughout the morning but it will start to dry up as the day progresses - remaining mild.