The purpose of this thesis is to provide an in-depth study of the goddess Roma and the development and spread of her cult across the eastern and western halves of the Roman Empire from the second century BC to the reign of Augustus. In the east the institution of her cult was the result of expanding Roman influence in the region, and served as a means for people to conceptualise the presence of Roman power. In contrast to this, her worship in the west, as part of the imperial cult, was mandated by the emperor Augustus. In order to better understand the place of Roma in the context of the western empire, I argue that it is best to view her as a deified abstraction. The deified abstractions were a group of divinities in Rome that embodied a s...