 Bentham’s Panopticon is, for Foucault, a paradigmatic architectural model of modern disciplinary power. It is a design for a prison, built so that each inmate is separated from and invisible to all the others (in separate “cells”) and each inmate is always visible to a guard situated in a central tower. Guards do not in fact always see each inmate; the point is that they could at any time. Since inmates never know whether they are being observed, they must behave as if they are always seen and observed. As a result, control is achieved more by the possibility of internal monitoring of those controlled than by actual supervision or heavy physical constraints.