That gown was intentionally Pre-Raphaelite in style, but I had also planned to wear it in the medieval group I'm a member of, when I had made a gamurra. Well, it only took 9 years ;)
But, however I looked I couldn't find a fitting silk damask, so I settled for a printed silk taffeta. It looked okay, but only when worn with something over it, so you didn't see so much of the pattern.
I also made a cap for it, based on a couple of quattrocento paintings showing coifs.
I didn't get the shape perfectly right, it puckers on the top/back of the head, but it's a good start for a new one later.