The Romans founded colonies throughout Italy and the provinces from the early Republic through the high Empire. Far from being mere ‘bulwarks of empire,’ these colonies were established by diverse groups or magistrates for a range of reasons that responded to the cultural and political problems faced by the contemporary Roman state and populace. This project traces the diachronic changes in colonial foundation practices by contextualizing the literary, epigraphic, archaeological, and numismatic evidence with the overall perspective that evidence from one period of colonization should not be used analogistically to explain gaps in the evidence for a different period. The Roman colonies were not necessarily ‘little Romes,’ either structurally, juridically, or religiously, and therefore their role in the spread of Roman culture or the exercise of Roman imperialism was more complex than is sometimes acknowledged.