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the Mamertine Prison: A Small Altar in Lower Room of Mamertime Prison

A Small Altar in Lower Room of Mamertime Prison

A small altar in the lower room of the Mamertime Prison. The upside-down cross lends the desolate place an extra-sinister air, but that's just the Cross of St. Peter (who was crucified upside down). In the foreground is a spring that Peter is said to have made miraculously spring up so he could baptize his fellow prisoners; the altar relief shows him doing so.

Credit: Holly Hayes