USA. Illinois. 2002. Stateville Prison. F house. There were originally four circular cell houses radiating around a central mess hall. The buildings were based on Jeremy Bentham's 1787 design for the panopticon prison house. The first round house was completed in 1919, the other three were finished in 1927. F house is the last remaining panopticon cell house. It's used for segregating inmates from the general prison population and for holding inmates who are awaiting trial or transfer. -Doug DuBois & Jim Goldberg.