End the day with a visitto the Basilica of S. Paolo Fuori le Mura. Built by Constantine in the 4th century on the tomb of Saint Paul (beheaded under Nero in 67 AD), the beautiful basilica remained the largest church in the world until the construction of today's Saint Peter's Basilica. What we see today is the faithful reconstruction that took place after the fire of1823, even if something remained, such as the triumphal arch, the Gothic ciborium and the candelabrum for the Easter candle