Though it seems like its a long way off on my own house restoration and usually one of the very last things you do, quality "document wallpaper' is perhaps the crowning touch to a room restoration. Although it seems far off I will likely be ordering wallpapers soon to have them on hand for that step. Many are fearful of wallpaper, worried about actually Pasting and hanging. We do it everyday, it just requires patience and attention to detail.
There are several companies out there that you have likely heard about who do period wallpapers. Bradbury is possibly the best known. However there are many other options out there and one of them is this "Alhambra" wallpaper from Burt Wallpapers http://www.burtwallpapers.com/pat.alhambra.html this paper comes in a 18 inch wide roll and has a 15 1/2 repeat and sells for 82.00 per roll. It is based on a late 1880's period original wallpaper.
Not inexpensive but certainly one of the highest quality papers out there and maybe the crowning touch for a formal parlor or hallway. Burt wallpapers offers several designs based on period original from the 1840's through the 1930's and the company can recreate and reproduce wallpaper from historic fabrics, essential if you have an original fragment of paper and want to do a true authentic period restoration.