Image from Marisa Ranieri Panetta’s Pompeii: History, Art, and Life in the Sunken City showing a detail of a photograph of a 1st century fresco depicting the god Bacchus and an agathodemon (aka agathodaimon aka agathodaemon) in front of Mount Vesuvius—originally from The House of the Centenary in Pompeii, currently displayed in the Archaeological Museum of Naples (photo by unknown, 2005).
(via Wikimedia Commons)