Pope Theodoros I of Alexandria, also known as St. Theodorus (Theodore), was the 45th Pope of Alexandria and Patriarch of the See of St. Mark. He was a monk in a monastery near Mariout, which was known as the monastery of Tanboura, under the guidance of a virtuous elder called Yoannis (John). Coptic literature states that Yoannis was inspired by the Holy Spirit that his disciple Theodoros would one day become a Pope and he told those who were in authority.