This early medieval pope who described himself as the "servant of the servants of God" is important because his reign demonstrates the reality that the papacy wielded both spiritual and temporal authority by the beginning of the Middle Ages. He was…

Gregory the Great

Explanation:

Gregory the Great is one of the greatest popes of the Roman Catholic church whose papacy lasted between the 3rd September,590 AD and 12th March,694.he is famous for his Gregorian Mission and his prolific writings.

Saint Gregory the Great as he is fondly called was from a very rich and famous Family,but during the period of his birth the world was under serious Economic issues.

Pope Gergory 1

Explanation: Pope Gregory 1, was Pope from 590 to 604 and was the first pope to use this title extensively to refer to himself as Pope, as a lesson in humility. The humble title "Servant of the Servants of God" was also first used by him, to countervailed the other's claim of power and eminence against the Bishop of Rome (which is the pope). Other Popes

after him used the phrase but not all for some centuries and they did so regularly in the 9th century. Some civil rulers once used the phrase also but after the 12th century it became exclusive to the Pope.