It enjoyed something of a revival in polemical popular prints after the Protestant Reformation, when figures from the opposite side would be shown disappearing into the mouth.
[3] Medieval theatre often had a hellmouth prop or mechanical device which was used to attempt to scare the audience by vividly dramatizing an entrance to Hell.
Some, even if naked, wear headgear indicating their rank at the top of society, with the papal tiara, king's crown and bishop's mitre the most common.
Schapiro speculates that the image may have drawn from the pagan myth of the Crack of Doom, with the mouth that of the wolf-monster Fenrir, slain by Vidar, who is used as a symbol of Christ on the Gosforth Cross and other pieces of Anglo-Scandinavian art.
[6] In the assimilation of Christianised Viking populations in northern England, the Church was surprisingly ready to allow the association of pagan mythological images with Christian ones, in hogback grave markers for example.
Likewise, any man who lets himself be tricked by a sweet smell and led to sin will go into hell, opened by the devil—if he has followed the pleasures of the body and not those of the spirit.