A look around Sweden's 'Mary Rose'
30 May 2013 Last updated at 10:16 BST
England's world famous Tudor war ship, the Mary Rose, is being unveiled to the public in a new museum display in Portsmouth.
She sank in 1545, and remained on the seabed until 1982. Many of the techniques used to preserve her were pioneered on another ship rescued from the depths of the sea after hundreds of years - The Vasa in Stockholm.
Robert Hall travelled to Sweden to speak to Dr Fred Hocker, Director of Research at Vasa Museum, about the procedures used to treat and protect these historic ships.
You can see a documentary about the raising and restoration of the Mary Rose Reborn this Saturday on BBC News Channel at 2.30pm.