I just (re)learned about the Chronica Majora by Matthew Paris, c.1240–5. It is full of illustrations of Ars period 
Above all, military, but it gets you quite a few stuff beyond that as well.
warfare.uphero.com/Medieval2/Chronica_Majora.htm
The page where I got the links
theminiaturespage.com/boards/msg.mv?id=292594
I like specially the map of Britain
hope you like it!
Cheers,
Xavi
