The Codex Aureus is at the Bavarian State Library in Munich and can be seen at the Library’s website. A challenge is that everything is in German. You can see the lavish cover here (click on the small picture to enlarge it) and view the entire codex here. Click on “Miniaturansicht” and you can see small pictures of five pages at a time. Click on “5 >>” to see the next five miniatures. Click on a miniature and the page will enlarge. View image 00014 and 00015, for instance, to see pages full of artwork.