List of Famous people named Clement

Clement Wing Hong Lam is a Canadian mathematician, specializing in combinatorics. He is famous for the computer proof, with Larry Thiel and S. Swiercz, of the nonexistence of a finite projective plane of order 10.

Guibert or Wibert of Ravenna was an Italian prelate, archbishop of Ravenna, who was elected pope in 1080 in opposition to Pope Gregory VII and took the name Clement III. Gregory was the leader of the movement in the church which opposed the traditional claim of European monarchs to control ecclesiastical appointments, and this was opposed by supporters of monarchical rights led by the Holy Roman Emperor. This led to the conflict known as the Investiture Controversy. Gregory was felt by many to have gone too far when he excommunicated the Holy Roman Emperor Henry IV and supported a rival claimant as emperor, and in 1080 the pro-imperial Synod of Brixen pronounced that Gregory was deposed and replaced as pope by Guibert.

Pope Clement II, was bishop of Rome and ruler of the Papal States from 25 December 1046 until his death in 1047. He was the first in a series of reform-minded popes from Germany. Suidger was the bishop of Bamberg. In 1046, he accompanied King Henry III of Germany, when at the request of laity and clergy of Rome, Henry went to Italy and summoned the Council of Sutri, which deposed Benedict IX and Sylvester III, and accepted the resignation of Gregory VI. Henry suggested Suidger as the next pope, and he was then elected, taking the name of Clement II. Clement then proceeded to crown Henry as emperor. Clement's brief tenure as pope saw the enactment of more stringent prohibitions against simony.

Pope Clement V, born Raymond Bertrand de Got, was head of the Catholic Church and ruler of the Papal States from 5 June 1305 to his death in April 1314. He is remembered for suppressing the order of the Knights Templar and allowing the execution of many of its members. Pope Clement V was the pope who moved the Papacy from Rome to Avignon, ushering in the period known as the Avignon Papacy.