
I've been looking at bath curtains, and I've been surprised at what I've found.
I had an assumption, you know the kind, the everyone knows thing, where I was completely convinced that medieval baths, when they had curtains at all (and a great many of them just show a tub, sans curtaining) and I was a little bit shocked to learn that I really knew nothing about medieval bath curtains. This is of critical importance right now, because for my medieval woman displays this year, my Medieval Lady's Chamber will have a bath. One can't get sexy unless one is adequately clean and fragrant!
Bath curtains are a great idea. They keep the warmth in and provide privacy. I expected to see image after image of white bath curtains which hung from a circular support, quite like a mosquito net. There were none. I found two with white curtains which were very tent-like but did not have a circular frame.

I found coloured curtains- striped and decorated fabrics, those also rising, tent-like.
Astonishingly, there were some on frames. Rectangular, on a pole, with the canopy and possible circular support, and domed. Interesting!
May other images show baths in buildings with integral curtaining which are brothels. These are 15th century. Other bathhouses are indoors but do not show the interior. So, only one with a possible circular support and only one with a bath sheet and 15th century, which is later than my period of interest- the 14th century.
I was also surprised at the lack of bath sheets, because everyone knows baths had sheets in them.
Armed with these thoughts, I've decided to make my bath close to my period. White sheets, supported tent-like on a pole and with a knop on top, as seen more represented than not, although the sample spectrum is very small. My bath has a bathsheet in it, but looking at other images, it really isn't the popular thing to do. Hmm.