Looks like there a medieval goatse there as well

http://assets.atlasobscura.com/article_images/lg/41889/image...

Risky click

Is there a website where one can read scanned medieval books?

Yes: http://quod.lib.umich.edu/e/eebogroup

http://image.ox.ac.uk/list?collection=all

http://www.bodley.ox.ac.uk/dept/scwmss/wmss/medieval/browse....

http://www.bl.uk/catalogues/illuminatedmanuscripts/welcome.h...

got medieval? http://www.gotmedieval.com/category/mmm-marginalia-2