Wow, even with restoration, those pictures make it look like it is in shockingly good shape. I would expect hundreds of years in seawater to leave essentially nothing remaining.
The Baltic Sea is cold and too low in salt for sea worms, so wooden wrecks survive much longer than anywhere else in the world.
Til. Cool
The section about conservation in that article is quite fascinating. Apparently the worms are also missing because of pollution in that part of the Baltic Sea, and said pollution is now destroying the ship anyway.