This ancient prison, also known as the Tullianum, is set below a 16th century church of San Giuseppe dei Falegnami.
It consists of two cells where famous prisoners were held. A legend says that two saints. Peter and Paul, were also imprisoned here.
Wikipedia https://en.wikipedia.org/wiki/Mamertine_Prison
Official website http://archeoroma.beniculturali.it
Email ssba-rm@beniculturali.it
Phone +39 06 480 201
Address 3 Via del Tulliano, Roma 00186, Italy
Coordinates 41°53'35.395" N 12°29'4.519" E