Stunning floor!

The original floor is so gorgeous and should be the highlight of the powder room. I think wallpaper could be a distraction. I vote for paint.

Suggest paint. Pick darkest color from tile, maybe what is in the little squares. Place a large vertical picure above toilet. No wider than the width of the tank. Maybe like the Art Deco building in the photo above. Dramatic using art . Then light colored hand towels that match porcelain or the color of the wall . Then an urn or some kind of ceramic piece on the floor, to the right of the sink.

HI -- This powder room should be dramatic and fun. A wall paper from that time period would work or one that has a linen texture with a sheen to it . Look at the Ralph Lauren Metallic paint --Burnished Gold ME136 -- would be fabulous and give you that Wow factor . Love the floors -- very special !