When Fuga rebuilt the portico in 1743, he re-used the eight ancient columns from the mediaeval portico that he demolished. Four of these are in grey granite, and four in red. He installed two to flank the central portal, two flanking the central entrance to the basilica and the other four at either end of the portico. The portico fronts five separate entrance doors. The middle three open into the central nave of the basilica, and the far right hand one leads into the campanile. The one on the far left hand side leads into the left hand aisle, and is the Holy Door which is only open during Jubilees (Holy Years). There is a doorway in the left hand end, which gives access to the formal staircase leading to the Loggia of Blessings.