History of the Christian Church, Volume IV: Mediaeval Christianity. A.D. 590-1073.

Celestine II
1144–1145
Lucius II
1145–1153
Eugenius III
Frederick I (Barbarossa)
1152–1190
1153–1154
Anastasius IV
Crowned emperor
1155
1154–1159
Adrian IV
1159–1181
Alexander III
1159–1164
Octavianus (Victor IV)
Guido Cremensis (Paschal III)
1164–1168
Johannes de Struma (Calixtus III)
1168–1178
1178–1180
Landus Titinus (Innocent III)
1181–1185
Lucius III
1185–1187
Urban III
1187
Gregory VIII
1187–1191
Clement III
Henry VI
1190–1197
1191–1198
Celestine III
1198–1216
Innocent III
Philip of Swabia and Otto IV (rivals)
1198
Otto IV
1209–1215
1216–1227
Honorius III
Frederick II.