The White Bull
The story is based on the Greek mythological tale of Europa and the bull, where the white bull is the king of the Greek gods, Zeus, in disguise. Zeus, the sky and thunder god of the Olympic pantheon, often wore a disguise when romantically pursuing mortal women, so as to avoid the eye of his wife and sister, Hera.
Theban kings in Greek mythology
"Amphion" and "Zethus" were the sons of Zeus by Antiope, conceived while Antiope was still in Thebes; they were born in secret and raised by shepherds in the vicinity of Mount Cithaeron. After their tearful reunion with their mother, Amphion and Zethus marched on Thebes and slew King Lycus and Dirce.