His Holiness Pope Agathon I (also Agatho or Aghathon) was the 39th Patriarch of Alexandria and the See of Saint Mark (661-677). He was a disciple to the holy father Abba Benjamin, 38th Pope. Abba Benjamin disappeared for a period of time from the face of his Chalcedonian persecutors and left Agathon to preach to the believers and establish them in the Orthodox faith. Agathon went around the streets and markets in the daytime wearing a carpenter's apparel, and during the night wearing a priest's uniform. He went around the houses also preaching and instructing the believers. He kept doing this till the Arab conquest of Egypt and the return of Patriarch Abba Benjamin to his chair. When Pope Benjamin departed, this saint was chosen for the honorable rank of patriarch.