This is the pride of Mainz's luxury vessel marina.
As always, there's a story.
These barges date back to 1898, when the city fathers had the idea of incenting folks to do their washing in the Rhine instead of overloading the newly installed water reticulation network.
So they had these mobile laundromats - "Waeschbrigge" - built and anchored along the banks of the river, where they stayed until 1962.
This one survived as a houseboat/floating (more or less) clubhouse until early 2006, when the level of the Rhine dropped significantly due to a dry spell and grounded it.
The rains came (or the snow in the Alps melted. Whatever), the waters returned, the boat stayed firmly where it was.
At about this point, the city gets in on the act. Which does not bode well. Ever.
They raise the boat - well, they TRY to raise the boat - without talking to the owner and everything goes pear-shaped.
Then they cancel his lease.
Now the lawyers are talking