Michael Ott, Catholic Encyclopedia (1913)
“ Agatho, Saint, Pope, b. towards the end of the sixth century in Sicily; d. in Rome, 681. It is generally believed that Agatho was originally a Benedictine monk at St. Hermes in Palermo, and there is good authority that he was more than 100 years old when, in 678, he ascended the papal chair as successor to Pope Donus. Shortly after Agatho became Pope, St. Wilfred, Archbishop of York, who had been unjustly and uncanonically deposed from his see by Theodore of Canterbury, arrived at Rome to invoke the authority of the Holy See in his behalf. ”
