High Altar

View of the High (main) Altar in the Basilica of Saint Paul Outside the Walls.  Note the ancient porphyry columns and the use of human figures on the corners of the canopy.

Below the Papal Altar there is a box that contains a chain made up of nine rings.  "An undisputed ancient tradition refers to be [sic] the chain which compelled Saint Paul to live as a prisoner in Rome."