Pope Leo the Great convinced Attila the Hun to not invade Rome.
Attila was a barbarian invader and Pope Leo convinced him not to sack Rome.
Charlemagne
He was not chosen pope by any king. Gregory was acclaimed pope by the citizens and clergy of Rome and then it was made official by an election carried out by the cardinals in April of the year 1073.
The pope crowned Charlemagne as King of the Holy Roman Empire in the year 800
Alexander the great did not conquer Rome or ancient Rome.
Yes, the pope is the bishop of Rome.
I think you are confused. Rome is in Italy. They didn't conquer themselves.
The Pope is the Bishop of Rome and the Vicar of Christ on Earth. There is nothing in Catholic doctrine or even custom to call him any title such as king of heavens and earth.
The bishop of Rome is the pope. Currently pope Francis is the bishop of rome
Pope Leo saved Rome from the Huns.
Saint Peter was the first pope in Rome.
The struggle between Pope Boniface VIII and King Philip the Fair was centered around the taxation of the clergy in France. Pope Boniface in 1296 issued a papal bull stating that anyone including king, emperors, and princes that exacted a taxation form clergy would be excommunicated. King Philip denied monies that was to be sent to Rome from France to Rome in response to this. This led to the Pope allowing taxation but only for emergency situations.