Pope John XIX

Pope John XIX (Latin: Ioannes XIX; died October 1032), born Roman of Tusculum, 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.

Source: Wikipedia — https://en.wikipedia.org/wiki/Pope_John_XIX