Epiphanius of Salamis (c. 315–403), a 4th-century bishop and saint honored by Eastern Orthodox and Catholic traditions, is renowned for his polemical work Panarion, a compendium of eighty heresies that shaped early Christian orthodoxy. His thorough defense of doctrine, though sometimes criticized for fervor over accuracy, offers invaluable insights into 4th-century theological disputes.
Authors like Philip Schaff emphasize his creeds and polemical approach, while the Encyclopædia Britannica describes his Panarion as a "medicine chest" against heretical beliefs. His disputes, including conflicts with John Chrysostom and Origenists, reflect his steadfast commitment to doctrinal purity, leaving a legacy of both influence and academic debate.