Pope Leo XIII, who was head of the Catholic Church from 1878 to 1903, laid the foundation for modern Catholic social thought, most famously with his 1891 encyclical Rerum Novarum, which addressed ...

St. Leo IV, whose eight-year pontificate ended in 855, restored several churches in Rome after Muslim invaders plundered the sacred structures. The Italian Renaissance painter Raphael commemorated ...

VATICAN CITY, — Robert Prevost, the new pope selected after Pope Francis' death, has chosen the name Leo, used by 13 popes before him dating back to the 5th century. To understand his choice, it ...

VATICAN CITY, — Robert Prevost, the new pope selected after Pope Francis' death, has chosen the name Leo, used by 13 popes before him dating back to the 5th century. To understand his choice, it ...

VATICAN CITY, — Robert Prevost, the new pope selected after Pope Francis' death, has chosen the name Leo, used by 13 popes before him dating back to the 5th century. To understand his choice, it ...

Pope Leo VIII served as a layman, or a nonordained male member of a church, but Otto pushed for him to be in the papacy. John XIII fled in December of 963 A.D., allowing for Leo VIII to take the ...

VATICAN CITY, — Robert Prevost, the new pope selected after Pope Francis' death, has chosen the name Leo, used by 13 popes before him dating back to the 5th century. To understand his choice, it ...

Pope Leo XIII, who was head of the Catholic Church from 1878 to 1903, laid the foundation for modern Catholic social thought, most famously with his 1891 encyclical Rerum Novarum, which addressed ...

Here's a look into what each Pope Leo did during their papacy.