What was so important about this ship and why did Julian and Lincoln Barnwell spend four years diving to find 17th Century ship the Gloucester?
The ship ran aground on the sandbanks near Great Yarmouth in Norfolk, carrying the future King of England, James Stuart.
He survived, but hundreds of others died.
University of East Anglia Professor Claire Jowitt explains the significance, and talks about the people aboard and why the ship ran aground.
Listen to the report by Lauren Aaarons.