Dredging has begun in the River Hull ahead of the restored Arctic Corsair's return as an attraction.
The 950-year-old work will be as safe "as a baby" during its move to London, French officials say.
Researchers made the findings with geological analysis and computer modelling.
A former industrial warehouse on Francis St is now home to artists from across Hull.
The watercolour portrait of the Nil Desperandum is among several maritime paintings being sold.
This sprawling ancient metropolis in the jungle of Ecuador has revealed a unique form of urbanism. The BBC visits the site for the story of this mysterious civilisation.
The coins and miniature weapons date back to a Celtic tribe who lived in the west of England.
The discovery was made by farm labourers clearing a hedge in 1866.
Items found for sale online had originally been stolen from a Hertfordshire and a Norfolk church.
