The Birth of Dionysus
Semele was a daughter of Cadmus, the first king of Thebes, famous for her extraordinary beauty and grace. When Zeus, the King of the gods, saw the princess, he fell in love with her.
Soon Semele became pregnant of Zeus, but Zeus' jealous wife Hera begrudged Semele's pregnancy and tried to destroy her... so one day she planted seeds of doubt in Semele's mind and made her very suspicious about Zeus' devine nature.
At that time, Zeus was deeply in love with Semele. To please her, he swore upon the sacred river of the gods Styx to make any wish of Semele come true. Semele asked from Zeus to reveal all his true form.
Zeus first tried to hold back but he had already made a sacred oath and was forced to obey Semele's order. So he revealed himself. Immediately, lightnings appeared and everything Zeus' thunderbolt touched was shaking and moving, wrapped in fire.
Fired were also wrapped around the beautiful Semele, burning her to death, because any mortal who would sight a deity in all his glory was cured to die.
By that time, Dionysus was still in Semele's womb. However, Zeus managed to recue the infant by binding him in his thigh. Still angry, Hera instructed the Titans to kill Dionysus and they did so swiftly. Rhea brought him back to life and Zeus found protection for Dionysus by sending him to be raised by the mountain nymphs.