The Pontifex Maximus (in Latin PONTIFEX MAXIMVS, "greatest bridge-builder") is the highest position available at Camp Jupiter, only used during crisis situations.
In the Roman Republic, the Pontifex Maximus was the highest elected religious official of ancient Rome and directed the College of Pontiffs (Collegium Pontificum), wielding both political and religious authority. He was elected by the Tribal Assembly and served for life, residing in the Domus Publica (“public house") and officed in the Regia, the site of the royal palace in the days of the monarchy.
Reyna Ramírez-Arellano stated no demigod in Camp Jupiter's history ever elevated themselves to the office of pontifex maximus; by doing so they would compare themselves to an emperor.
While experiencing dream visions, Reyna sees Camp Jupiter's forces preparing for the invasion on Camp Half-Blood. She then sees Octavian wearing a white cloth mantle over his head which marked him as the Pontifex, this made her want to strangle him.
After the underwater battle with Polybotes, Kymopoleia calls Jason Grace pontifex and reminds him to keep his promise about honoring every minor god there is a shrine in Camp Jupiter and Camp Half-Blood.
Known Pontifices Maximi
- Imperator Caesar Augustus, the first Roman emperor, assumed the office of Pontifex Maximus in 13 BC, following the death of Marcus Aemilius Lepidus (who was a part of the Second Triumvirate alongside Augustus and Marcus Antonius); afterwards, the chief priest's office was moved from the Regia to Augustus' personal residence, the Domus Augusti (“house of Augustus”), located atop Rome's Palatine Hill.
- A white cloth mantle over the head marks one's status as Pontifex Maximus.
- It is unknown if Jason was made Pontifex Maximus before his death.