Pope Benedict IX, born Theophylactus of Tusculum in Rome, was the bishop of Rome and ruler of the Papal States for three periods between October 1032 and July 1048. Aged about 20 when first elected, he is the youngest pope in history. He is the only person to have been Pope more than once and the only person ever accused of selling the papacy.

Pope John XIX, born Romanus, was the bishop of Rome and ruler of the Papal States from 1024 to his death. He belonged to the family of the powerful counts of Tusculum, succeeding his brother, Benedict VIII. Papal relations with the Patriarchate of Constantinople soured during John XIX's pontificate. He was a supporter of Emperor Conrad II and patron of the musician Guido of Arezzo.