There is only one pope at a time and there have been 266 popes over the years in the Catholic Church. However, there are also a few Orthodox sects that call their leader a pope.
The vast majority of popes have been Italian. As of February of 2013 there have been only 18 popes from other countries.
In the early centuries of the Church there were three popes from northern Africa but nothing is known of their races. All other popes have been caucasian.
Yes, they had many differences on matters of authority and doctrine. Some Popes were even excommunicated by Church Synods (or Councils) and other rival Popes were elected in their place, called Ante-Popes.
Very few popes have had sexual relationships with mistresses and Benedict is not one of them.
Popes do not elect popes. Popes are elected by the cardinal electors.
This is NOT possible.
8 popes and countless other important people
The Basilica of St. John Lateran is the cathedral of the popes. There are six extant papal tombs inside the Archbasilica: Alexander III, Pope Sergius IV, Pope Clement XII, Pope Martin V, Pope Innocent III and Pope Leo XIII. A number of other popes were also buried there but these tombs were lost in two terrible fires in the 14th century.
No, popes are only infallible when speaking ex cathedra on matters of faith and morals. In all other matters they are no different from any other human.
There have been 17 popes from France, the second behind Italian popes.
the popes had more power over the kings
Prior to Benedict XVI there were 14 other popes with that name. Pope Benedict X was an antipope and does not count.