Not a Historian here, but I've heard that looking at Medieval art is more akin to looking at Anime art. Yes, the art is more stylized and cartoonish, but so are many art forms of today. I'm not certain of this, but I believe we have examples of 'classical'/realistic paintings from the medieval period/places alongside the stylized/cartoonish pictures too. As in, medieval art was a fad. Again, not a historian, someone please correct me!