Sacred Destinations Destinations St. Peter's Basilica St. Peter's Basilica Photos 25787 × share full URL share short URL embed link code photo 91 of 126 Previous | Next Confessio The Confessio, a 17th-century sunken chapel honoring the confession of St. Peter that led to his martyrdom on Vatican Hill. His tomb is behind the Niche of the Pallium, the illuminated part seen in this photo. Credit: Holly Hayes