Tapestries!! I love them. And it's so easy to get the look of them at any price point.
I'll start with a few examples from a tapestry seller's website:
And another example from my entry, scored on Etsy for an unbelievable $30 (it's large!).
A gorgeous example recently posted by the Frouds on their fan page on Facebook. (dreamy eyes)
And another example in Terri Windling's studio space:
And of course there's the ultimate example...the Gryffindor Common Room. I can hardly focus when they have a scene in here, because I can't stop staring at those FULL WALL Lady and the Unicorn tapestries.
Now for a little advice. Pyramid Collection sells a lovely set of two Mucha tapestries we also have in our house. For $89.95 for two, you get a lot of bang for your buck, and the hangers are included.
It's also possible to buy unfinished panels of tapestries on Ebay, or to just find a repeating pattern tapestry fabric you like and make a large wall hanging from it.
Or, if you have no sewing skills at all whatsoever, a nice and ultra-inexpensive way to add the medieval tapestry feel to your walls is to purchase a lovely brocade or patterned table runner with pointed and tasseled ends. Cut the table runner in half, and use fabric glue or iron-on adhesive strips to create a "pocket" on each of the cut ends. You're left with two small "banners" ready for a hanging rod to add a touch of medieval flair to your wall! Buy two or three table runners, and the banners can cover a whole wall!