The imposing prison looks like a gloomy fortress on this appropriately overcast day.
A historical marker to the Pennsylvania system of penology.
The original idea was to cut the prisoners off from all human contact. Interaction with guards or other prisoners was forbidden, and prisoners were originally held in solitary cells with only a small trap door to receive food. Prisoners were referred to by numbers and were completely covered in a cloth garment (de-identified) when outside of their cells.