A troupe of mummers in animal costumes performing in a Medieval Baronial Hall at Christmas, c. 1500

Nittel Nacht: The Jewish Christmas Eve

'Twas the night before Christmas, and an undead Jesus walked the earth. No wonder early modern Jews played games and sang songs to scare him off.
Otto Marseus van Schrieck - Stilleben mit Insekten und Amphibien, 1662

A Recipe for Flies and Frogs

And other wonders of spontaneous generation.