About Mamertine Prison

The Mamertine Prison, notorious for its harsh conditions, is traditionally believed to have held both the Apostle Paul and Peter during their second captivity.

Location and Significance

The prison lies beneath the Church of San Giuseppe dei Falegnami, near Capitoline Hill and the Roman Forum. It was reserved exclusively for political prisoners awaiting execution, highlighting its role in punishing enemies of the state rather than common criminals. 

Architecture and Layout

Built around the 7^th century BCE, the prison has two levels: the upper Carcer with a travertine façade, and the lower Tullianum, accessed by lowering prisoners through a hole. The Tullianum contains a natural spring or well, possibly used for ritual purposes before apostolic times. 

From Prison to Place of Worship

By the 7^th century, the prison’s association with Apostles Paul and Peter transformed it into a Christian worship site, with a chapel built above to house a crucifix once displayed on its façade.