How the Horn of Plenty came about, who filled it, how it often appears with the four elements, and some more complex mythological associations.
Wolffort
Neptune’s trident has three tines, while Pluto’s is a bident with only two. Or it could be a pitchfork. How to read them in paintings.
After 1600, series of four paintings fell from favour, and artists, particularly the Brueghel family, combined all into single images.
The Eclectic Light Company 