7th–8th c.: 89–96; 8th–9th c.: 97–130; 9th/10th c.: 131–136; 10th/11th c.: 137–149; 11th/12th c.: 151–174; 12th c.: 175–205; 12th/13th c.: 206–217. Authors by rank or background Secular rulers Byzantine emperor Alexius I Comnenus (155) Crusader King Baldwin I of Jerusalem (155) Roman emperor Constantine I (8) Frankish Emperor Charlemagne (97–98) King Charles the Bald (124) Crusader Godfrey of Bouillon (155) Henry II, Holy Roman Emperor (140) King Lotharius I (97–98) King Louis the Pious (104) King Louis VII of France (155) Popes Pope Adrian IV (188) Pope Alexander III (200) Pope Anastasius IV (188) Pope Benedict I (72) Pope Benedict III (115) Pope Boniface II (64) Pope Calixtus II (163) Pope Celestine III (206) Pope Clement III (204) Pope Cornelius (3) Pope Eugene III (180) Pope Felix III (58) Pope Felix IV (64) Pope Gelasius I (59) Pope Gelasius II (163) Pope Gregory I (75–79) Pope Gregory IV (106) Pope Gregory VIII (202) Pope Hilarius (58) Pope Honorius II (166) Pope Hormisdas (63) Pope Innocent III (214–217) Pope John II (72) Pope John VI (89) Pope John XIII (135) Pope John XIX (141) Pope Innocent I (20) Pope Leo I (54–56) Pope Leo II (96) Pope Leo IV (115) Pope Nicholas I (119) Pope Paschal II (163) Pope Pelagius II (72) Pope Sergius I (89) Pope Sergius II (106) Pope Simplicius (58) Pope Stephen I (3) Pope Sylvester II (139) Pope Leo IX (143) Pope Gregory VII (148) Pope Victor III (149) Pope Urban II (151) Pope Urban III (202) Other bishops Absalon, bishop of Roskilde, Danish statesman and archbishop of Lund (209) Adalberon, bishop of Laon (141) Aldhelm, Bishop of Sherborne (89) Bishop Saint Ambrose of Milan (14–17) Archbishop Anselm of Canterbury (158–159) Bishop Anselm of Lucca (149) Bishop Saint Augustine of Hippo (32–47) Bishop Avitus of Vienne (59) Bishop Baldric of Dol-en-Bretagne (166) Saint Cassian of Imola, bishop of Brescia (49–50) Bishop of Poitiers Gilbert de la Porrée (64) Bishop Saint Gregory of Tours (71) Bishop Saint Hilary of Arles (50) Bishop Saint Hilary of Poitiers, Doctor of the Church (9–10) Bishop Saint Isidore of Seville (81–84) Bishop Ivo of Chartres (161–162) Bishop of Chartres John of Salisbury (199) Archbishop of Canterbury Lanfranc (150) Bishop Liutprand of Cremona (136) Bishop Saint Martin of Tours (18) Bishop of Paris Maurice de Sully (200) Bishop Odo of Bayeux (155) Missionary Bishop Saint Patrick (53) Bishop Saint Paulinus of Nola (61)