Cardinals
The Cardinals of the Holy Roman Catholic Church
The cardinals are organized chronologically by the pontificates in which they were created. The pontificates are arranged by century.
www2.fiu.edu/~mirandas/essay.htm
Wikipedia - Cardinal
The Wikipedia explanation of the position of cardinal.
en.wikipedia.org/wiki/Cardinal_(Catholicism)
Wikipedia - List of Cardinals by country
This is a sortable list of living cardinals in the Roman Catholic Church.
en.wikipedia.org/wiki/List_of_Cardinals_by_country