Velleius Paterculus’ short work is the earliest surviving attempt on the part of a post-Augustan historian to survey the history of the res publica from its origins to his own times. In a period from which no other contemporary historical narrative survives in more than meagre fragments, Velleius’ work is uniquely important. It is a critical counter to the later accounts of Tacitus, Suetonius and Cassius Dio, not simply because it offers a different view of Tiberius, but because Velleius saw continuity where later authors saw only radical change which destroyed the Republic and put monarchy in its place. For other reasons, too, Velleius occupies a unique position in Roman historiography. This collection of papers, by a distinguished cast of scholars, represents a wide-ranging re-examination of Velleius’ work, of its place within, and contribution to, Roman historiography and the intellectual history of the early Principate.