But centre stage, as Catiline’s main adversary, we find the one person whom it is possible to get to know better than anyone else in the whole of the ancient world. Cicero’s speeches, essays, letters, jokes and poetry still fill dozens of volumes of modern printed text. There is no one else in antiquity until Augustine – Christian saint, prolific theologian and avid self-scrutiniser – 450 years later, whose life is documented in public and private fully enough to be able to reconstruct a plausible biography in modern terms.