Pope Justus of Alexandria was a second-century Christian leader who served as the sixth Patriarch of Alexandria. Born in Roman Egypt, he was a highly educated man and a presbyter before his elevation to the patriarchate. He was baptized by Mark the Evangelist, who also designated him as the initial Dean of the Catechetical School of Alexandria. After being ordained a deacon and then a priest by Anianus, the second patriarch, Justus succeeded Primus to lead the church for ten years.