The closing chapter of Saint Paul’s earthly life unfolds in the heart of the Roman Empire, where the Apostle to the Gentiles bore his final witness to Christ. While the New Testament narrative concludes with Paul under house arrest, “proclaiming the Kingdom of God … without hindrance” (Acts 28:31), ancient tradition and the liturgical memory of the Church preserve the darker, more sorrowful details of his final days. This period is marked by two distinct sites of immense spiritual significance: the Mamertine Prison, a dungeon of suffering where Paul is believed to have been held during the Neronian persecution, and Aquae Salviae (Tre Fontane), the place where he was silenced by the sword. Together, these locations trace the final steps of the man who, having “fought the good fight” and “finished the race,” offered his life as a libation for the faith he once sought to destroy (2 Tim 4:7).