This presentation is based on a kind of record that is essentially unknown among Germanic researchers. From the sixteenth century on, local authorities monitored the comings and goings of strangers and foreigners, keeping ever more detailed records of newcomers—primarily for the safety of local residents. The personal details contained in such records make them a valuable resource for family history research. This presentation exhibits the form and content of residential registration and traces the historical development up to the late nineteenth century; by then, in most states every man, woman, and child was registered—whether local or from elsewhere.