I was just surfin\' the net and came upon the Metropolitan Museum of Art. They have loads of great pictures from their collection of medieval armor, arms and art, but also all sorts of inspiring stuff from around the world during the last couple of thousands of years.
http://www.metmuseum.org/Works_of_Art/collection.asp?HomePageLink=permanentcollection_l
http://www.metmuseum.org/Works_of_Art/collection.asp?HomePageLink=permanentcollection_l