Looking for reference Medieval Europe Map

[RjBeals]

I make maps for an online gaming site, similar to Risk. My next project is simply "Medieval Europe". That's a really huge subject, and spans hundreds (almost thousands?) of years. I'm not great with history, and this topic is to vast for my little brain to piece into a game map. But hopefully, theres someone out there who's a history buff who can help out.

What it should end up being, is a geographic map of Europe and outer Europe including lots of regions and bonuses. Similar to the Sega game Medival II Total War (Map shown below). The larger empires would have a castle that would have to be captured for an even greater bonus.

My problem is that I can't find suitable reference maps for this. The closest I've come to that I can use as game reference is Europe 814, but I'm not so sure about it. Can anyone of you help by either linking to a map, or a site, or just maybe suggesting a time period with lots of castles and empires?

Thanks all -