Medici Riccardi Palace, Gallery of Mirrors (or Room Luca Giordano): “Transport to the Underworld”; detail of the vault.Frescoes by Luca Giordano; 1682 - 1685.Detail with the dog Cerberus, placed on the shore awaiting the arrival of Pluto, Charon on the boat. Above is the fluttering Night, which with its cloak of stars protects sleep (the cherubs with masks and butterfly and bat wings instead symbolize dreams).