Had an affair with Clodia some time after her husband had died in 59 B.C.
Replaced Catullus as her lover, perhaps while Catullus was off in Bithynia.
Successfully defended by Cicero on a charge of attempting to poison Clodia in 56 B.C. (Pro Caelio Speech)
Praetor in 48 B.C. (under Julius Caesar, but removed from office and killed in riots.
Poems addressed to "Caelius" (but Poem 100 may refer to a different Caelius):