There are many iconographies
on the Supreme Pontiffs, from St. Peter to the present day. The set used in this timeline is the one highly valued and officially acknowledged by the Vatican. It is found in the naves of the Patriarchal Basilica of St. Paul- Outside the Walls in Rome, Italy. The reproductions in the Pope Chart* are from this collection. The collection is made of medallions in mosaic; each one has the Pontiff’s name written in Latin and the period of his pontificate in Roman numbers. This iconography was started by St. Leo the Great in 498 and historically updated in 1947.