Caliban upon Setebos is a poem written by the British poet Robert Browning. It deals with Caliban, a character from Shakespeare's The Tempest, and his reflections on Setebos, the brutal god he believes in. Browning was of the belief that God is in the eye of the beholder so to speak, and this is emphasized by a barbaric character believing in a barbaric god.
Caliban is a fictional character in William Shakespeare's The Tempest, a deformed monster who is the slave of Prospero.
Caliban is the son of the witch Sycorax by (according to Prospero) a devil.
Caliban was originally mostly a comic figure; however, in later years, he became a symbol for the wild, natural man. And, in more recent times, Caliban has been used as a metaphor for colonialism by anti-colonial intellectuals.