Apparently "the only 16th century warship on display anywhere in the world." Commissioned by Henry VIII in 1510, she was the largest ship in the King's fleet at the time. Deployed against an aggressive French fleet threatening the English coast, she was sunk in 1545 in Portsmouth Harbour, in circumstances that remain unclear, but were probably related to her size and the fact she had been fitted with opening gun ports to accommodate additional cannon (these then allowing the ingress of water).
You see here the preserved right hand section of the ship - she sank and laid on the sea bed on her right side, which was covered in harbour silt and thus preserved against decay. It's impressive!