Sixtus of Reims was an early Christian presbyter who served as the first bishop of Reims. Sent from Rome to Gaul to aid in the conversion of the region, he is credited with establishing the Christian sees of Reims and Soissons alongside his companion, Sinicius. While some traditions suggest he was a disciple of Saint Peter, historical accounts from the 9th century indicate he was dispatched by Pope Sixtus II to assist in the Christianization of the area.