John III was pope from 561 to 574. A Roman surnamed Catelinus, he was of a distinguished family, being the son of one Anastasius who bore the title of illustris. Although John reigned nearly thirteen years very little is known of his pontificate. It fell during the stormy times of the Lombard invasion, and practically all the records of his reign have been destroyed. It is recorded in the Liber Pontificalis that he died on July 7, 574.
Segni and nephew of Clement III, born 1160 or 1161 at Anagni, and died 16 June, 1216, at Perugia.
elected is worthy of the imperial dignity belongs to the pope, whose office it is to anoint, consecrate, and crown him; otherwise it might happen that the pope would be obliged to anoint, consecrate, and Crown a king who was excommunicated, a heretic, or a pagan.
The same legate was instructed by the pope to threaten Philip Augustus with interdict over the whole of France if within a month he would not be reconciled with his lawful wife, Ingeburga of Denmark, whom he had rejected and in whose stead he had taken Agnes, daughter of the Duke of Meran.