Mouth of hell and change in comments policy

Here's an image from The Hours of Catherine of Cleves which is a mid 15th century Dutch rendering of a triple-decker gate of hell. Much more at the Morgan's site.

Also, a note on comments: Comments that are relevant to our topics are entirely welcome and desired. Due to a recent spate of comments from spammers, I've turned on the "moderation" function. Now when commenting you'll be asked to type in a code. This is to deter non-human Internet denizens from leaving their traces, speaking of mouths of hell.