A folklore character popular in Europe, Melusina is a spirit of of fresh water springs and rivers who is often depicted looking much like a mermaid (a woman with the bottom half of a fish) though as a 'nixie' she is also illustrated as having wings and/or two tails.
Known by many as the Mermaid of Luxembourg, legend has it that Mesulina was the beautiful wife of Count Siegfried, the founder of the city, who loving his wife as he did agreed on marriage to the one request she made of him.
That request being that once a month on the first Wednesday (OR as some would argue once a week on a Saturday) she should be left to retire alone to her chambers, a cavern hewn into the rocks, where he was to leave her undisturbed so, as legend has it, she could take her weekly bath in complete privacy.
Anyway, all goes well until just like the proverbial curious cat Melusina's husband wonders what his wife is doing and peers through the keyhole into her chamber where he beholds his wife lying in the bath .............
Not so say other legends. According to some, on being spied by her beloved, Melusina flies from the bathroom window whereupon she takes the form of a dragon with four clawed feet, bat-like wings and a monstrous head.