Theodor Mommsen's influential study (1871–1888), is a systematic treatment of the intricate workings of the Roman state. The renowned German scholar proposed an original and sometimes controversial understanding of the Roman state, based around the categories of nineteenth-century constitutional law. Volume 1 focuses on local government.

Theodor Mommsen's influential multi-volume work, first published between 1871 and 1888, is a systematic treatment of the intricate workings of the Roman state. The renowned German scholar proposed an original and sometimes controversial understanding of Roman institutions, based around the categories of nineteenth-century constitutional law. The Romans themselves never actually codified their complicated body of law, but by applying a historical approach to describe the development of Roman law Mommsen succeeds in making it more accessible to the reader. He systematises the many diverse legal elements upon which the Roman constitution was based and offers a coherent reading of it. In Volume 1 Mommsen focuses on the system of local government and describes in detail how it functioned. He explains the protection offered by the Pontifex maximus and the authority held by the civil and criminal courts, as well as the civil rights given to each community.