In the picture is Pope John's XXIII medal, where it says:
Pontifex Maximus.
Romans
believed that gods effected and ruled in seven hills of Rome "De
septem montibus virum". About this belief formed concept to Romans;
High town of seven hills, which rules the whole world. Romans believed,
that they must rule the whole world under the leadership of Jupiter
high priest (Pontifex Maximus). Symmachus, who was the high priest of
Rome (Pontifex Maximus) called himself for the man of the seven
mountain.
According to Romans' opinion, the world can only rule he who rules in
Rome, in the town of seven hills. Julius Caesar got title Pontifex
Maximum and like this way emperor started use also this title. The
emperors led state and also religious life of Rome, because the
emperor was principal of religion, the high priest (Pontifex Maximus).
Moreover, Popes hold themselves as heir of gentile Jupiter high priest
(Pontifex Maximus) and Roman Catholic Church openly admit this,
because they have imprinted the name of Pontifex Maximus to mean to be
a Pope!
Jupiter
high priest (Pontifex Maximus) cult is a service of idols. Like this
we can see to whom Roman Catholic Church worships and serves.