A former slave born in northern Italy,Pius was the bishop of Rome when those pesky Gnostics and Marcionites came to town. The origin of the word “Heresy” means “to choose”,and these groups of herectics would cherry pick bits of Christianity to pervert and twist for ideas suited to their own agendas. Gnostics(snobby hippy dippy “Christians”),believed that only a elite chosen few with special knowledge and gifts could ever know Christ,and the Marcionites taught that there were two different Gods from the first to second Testaments. Pius spent a lot of his time dealing with these groups,and to deal with the Marcionites,he held a trial for their leader Marcion and then excommunicated him,possibly the first excommunication due to heresy. Pius built the Santa Pudenziana,the oldest place of Christian worship in Rome and the home of all the Bishops of Rome until the year 313,when Emperor Constantine I offered his Lateran Palace to the Bishop to live in. He admitted Jewish converts and allowed them to be baptized and he officially decreed that Easter was to be celebrated on a Sunday. I drew him wearing a Papal Tiara,I’m about 600 years too early for this,but I was just itching to draw a Pope hat.