Hah.... for music I have used a lot of Mortiis, Vond of course, King Raven - Vols. 1 - 3 by Jeff Johnson & Brian Dunning, are okay.
Movies TV... Dresden files, Vahalla Rising, Agora, The Crusaders, Black Death...
The Advocate. I cannot say enough how amazing this movie is to grok the times and mentality of a completely fictional look at the era. It is silly and fun but is a complete companion adventure. You could take the movie and put it right into any game set in Normandy, Rhine, or even some surrounding Tribunals.
...Season of the Witch, Taras Bulba (not good but good ), Sword of War, Flesh + Blood, Anchoress, Beowulf and Grendel, Hagbard and Signe, Tristan & Isolde, Ivanhoe series as well as the Pillars of the Earth series.
I leave Ironclad as last... Paul Giamatti as King John dealing with the Magna Carta, is something everyone needs to see!!!!
Now for books, non-fiction:
Anything by John Julius Norwich... a friend clicked me onto this guy and I have been collecting his books ever since.
Women in Purple: Rulers of Medieval Byzantium by Judith Herrin.... I've enjoyed her writing on Byzantium
The Alexiad Anna Komnene I haven't gotten around to reading but I have had about ten conversations about it... got to be great
Thomas Costain writes good stuff, as well as Frances Gies
Fiction my books list is far too long,
Bernard Cornwell is way to obvious, the Northmen stuff is brilliant
Glen Cook and Steven Erikson write truly great Ars Magica inspiring stuff. Granted it is more D&D than Ars, but Erikson's ideas are endless!
Guy Gavriel Kay is without equal when writing the genre I can never remember what it is called.... historical fantasy fiction? alternate fantasy historical fiction? I can never get the term right even though I've been told about a dozen times READ HIS STUFF! it is very nice
Karen Maitland has written about half a dozen books that have the most unique perspective and style, good times.
Joe Ambercrombie... again closer to D&D than strict Ars, however such a thoughtful and consistent writer. Best Served Cold is perfect.
Stephen Lawhead"s Robin Hood series is the best take on Robin Hood I have ever read, though I admit I have always hated reading Robin Hood,
Name of the Rose and The Island of the Day Before are great by Umberto Eco... Baudolino is just.... reading it leaves me speechless
I want to give him space from the rest on the list... Terry Pratchett. He groks this world, our present and our past with such complete understanding that I truly think using grok is the only appropriate way of stating it. I love Pratchett and any single book can be used as a seed for an amazing Ars adventure.
Sergey Lukyanenko and is Watch series is full of how magic and the supernatural world might be... excellence every read.
Scott Rezer wrote the Leper King... I still look at it and cant decide how I feel
Just to bring this to a short end, because none of the lists above are completed with my recommendations, but only the ones I could think off the top of my head. I would like to end with a final fictional author which has absolutely changed how I enjoy books.
K.J. Parker writes so very good books. Read them, I would like to see how others feel. I thought her Fencer trilogy was the best fiction I had read in a decade, then I read The Engineer Trilogy when it came out. While they both seem to have very mirroring themes.... I reread these books every year. They are essentially perfect in every regard. A character which anyone would overlook and yet commands 1300 pages... brilliant. And the entire purpose of the series is the exact reason I make every story in any medium.
Well there is it, a short list...