Four months after Caesar's death, a bright comet appeared in the sky.  Romans believed that it was a sign of Caesar's divinity.  In 42 BC, it was decided that Caesar should become a god.  The temple of Divine Julius was built in his honor in the Roman Forum and priests were appointed to serve it.  A coin was minted showing the comet and reading DIVUS JULIUS.

Decades later, one of Rome's greatest poets, Ovid, wrote these lines about the deification of Julius Caesar:

But you meanwhile from Caesar's murdered corpse
Must seize the soul and make it a bright star,
So that great Julius, a god divine,
From his high throne in heaven may ever shine
Upon the Forum and our Capitol.

-- Ovid’s Metamorphoses
Study of Caesar’s Corpse by Jean-Leon Gerome, 1867
Caesar Becomes a God
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