During the first century B.C.E. a complex system of surveillance towers
was established during Rome's colonization of the central Alentejo
region of Portugal. These towers provided visual control over the
landscape, routes through it, and hidden or isolated places as part of
the Roman colonization of the region. As part of an archaeological
analysis of the changing landscape of Alentejo, Joey Williams offers
here a theory of surveillance in Roman colonial encounters drawn from a
catalog of watchtowers in the Alentejo, the artifacts and architecture
from the tower known as Caladinho, and the geographic information
systems analysis of each tower's vision. Through the consideration of
these and other pieces of evidence, Williams places surveillance at the
center of the colonial negotiation over territory, resources, and power
in the westernmost province of the Roman Empire.